346505
The allele frequency of ' A ' and ' a ' in a population are 0.6 and 0.4 respectively. The expected frequency of heterozygous individuals is:
1 \(48 \%\)
2 \(36 \%\)
3 \(16 \%\)
4 \(24 \%\)
Explanation:
In a population, autosomal dominant recessive inheritance can be expressed by Hardy-Weinberg. The simple algebraic expression is: \(\mathrm{p}^{2}+2 \mathrm{pq}+\mathrm{q}^{2}=1\) where, \(\mathrm{p}\) is the frequency of \(\mathrm{A}=0.6\) \(\mathrm{q}\) is the frequency of \(\mathrm{a}=0.4\) \(2 \mathrm{pq}\) is the frequency of \(\mathrm{Aa}\) (heterozygous individuals) \(=2 \times 0.6 \times 0.4=0.48\) Thus, the expected frequency of heterozygous individuals \(=48 \%\).
KCET - 2018
BIOXII07:EVOLUTION
346506
Assertion : Disruptive selection changes the population towards one particular direction Reason : This type of selection favours average sized individuals
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Disruptive type of selection favours both small sized and large sized individuals .It eliminates most of the members with mean expression,so produces two peaks in the distribution of the trait that may lead to development of two different population. This kind of selection is very rare in nature. But it is important in bringing about evolutionary change.
BIOXII07:EVOLUTION
346507
Statement A : Variations due to gene flow changes allele frequency in future generation. Statement B : Gene flow occurs due to multiple gene migration
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both are correct.
BIOXII07:EVOLUTION
346508
The frequency of two alleles in a gene pool is 0.19 (1) and 0.81(1). Assume that the population is in Hardy-Weinberg equilibrium. The percentage of heterozygous individuals in the population is
1 0.81
2 0.31
3 0.19
4 1
Explanation:
According to the Hardy-Weinberg Equilibrium equation, heterozygotes are represented by the \(2 \mathrm{pq}\) term.Therefore, the number of heterozygous individuals \((\mathrm{Aa})\) is equal to \(2 \mathrm{pq}\) which equals \(2 \times 0.19 \times 0.81=0.31\) or \(31 \%\)
BIOXII07:EVOLUTION
346509
Assertion : Genetic drift refers to changes in the allele frequency occurring by chance Reason : Sampling error often lead to the elimination of certain alleles and fixation of other reducing genetic variability
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Genetic drift refers to elimination of genes of certain traits when a section of population migrates or dies, it will alter gene frequency of remaining population. Hence genetic drift is a mechanism of evolution that acts in concert with natural selection to change species characteristics over time.
346505
The allele frequency of ' A ' and ' a ' in a population are 0.6 and 0.4 respectively. The expected frequency of heterozygous individuals is:
1 \(48 \%\)
2 \(36 \%\)
3 \(16 \%\)
4 \(24 \%\)
Explanation:
In a population, autosomal dominant recessive inheritance can be expressed by Hardy-Weinberg. The simple algebraic expression is: \(\mathrm{p}^{2}+2 \mathrm{pq}+\mathrm{q}^{2}=1\) where, \(\mathrm{p}\) is the frequency of \(\mathrm{A}=0.6\) \(\mathrm{q}\) is the frequency of \(\mathrm{a}=0.4\) \(2 \mathrm{pq}\) is the frequency of \(\mathrm{Aa}\) (heterozygous individuals) \(=2 \times 0.6 \times 0.4=0.48\) Thus, the expected frequency of heterozygous individuals \(=48 \%\).
KCET - 2018
BIOXII07:EVOLUTION
346506
Assertion : Disruptive selection changes the population towards one particular direction Reason : This type of selection favours average sized individuals
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Disruptive type of selection favours both small sized and large sized individuals .It eliminates most of the members with mean expression,so produces two peaks in the distribution of the trait that may lead to development of two different population. This kind of selection is very rare in nature. But it is important in bringing about evolutionary change.
BIOXII07:EVOLUTION
346507
Statement A : Variations due to gene flow changes allele frequency in future generation. Statement B : Gene flow occurs due to multiple gene migration
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both are correct.
BIOXII07:EVOLUTION
346508
The frequency of two alleles in a gene pool is 0.19 (1) and 0.81(1). Assume that the population is in Hardy-Weinberg equilibrium. The percentage of heterozygous individuals in the population is
1 0.81
2 0.31
3 0.19
4 1
Explanation:
According to the Hardy-Weinberg Equilibrium equation, heterozygotes are represented by the \(2 \mathrm{pq}\) term.Therefore, the number of heterozygous individuals \((\mathrm{Aa})\) is equal to \(2 \mathrm{pq}\) which equals \(2 \times 0.19 \times 0.81=0.31\) or \(31 \%\)
BIOXII07:EVOLUTION
346509
Assertion : Genetic drift refers to changes in the allele frequency occurring by chance Reason : Sampling error often lead to the elimination of certain alleles and fixation of other reducing genetic variability
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Genetic drift refers to elimination of genes of certain traits when a section of population migrates or dies, it will alter gene frequency of remaining population. Hence genetic drift is a mechanism of evolution that acts in concert with natural selection to change species characteristics over time.
346505
The allele frequency of ' A ' and ' a ' in a population are 0.6 and 0.4 respectively. The expected frequency of heterozygous individuals is:
1 \(48 \%\)
2 \(36 \%\)
3 \(16 \%\)
4 \(24 \%\)
Explanation:
In a population, autosomal dominant recessive inheritance can be expressed by Hardy-Weinberg. The simple algebraic expression is: \(\mathrm{p}^{2}+2 \mathrm{pq}+\mathrm{q}^{2}=1\) where, \(\mathrm{p}\) is the frequency of \(\mathrm{A}=0.6\) \(\mathrm{q}\) is the frequency of \(\mathrm{a}=0.4\) \(2 \mathrm{pq}\) is the frequency of \(\mathrm{Aa}\) (heterozygous individuals) \(=2 \times 0.6 \times 0.4=0.48\) Thus, the expected frequency of heterozygous individuals \(=48 \%\).
KCET - 2018
BIOXII07:EVOLUTION
346506
Assertion : Disruptive selection changes the population towards one particular direction Reason : This type of selection favours average sized individuals
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Disruptive type of selection favours both small sized and large sized individuals .It eliminates most of the members with mean expression,so produces two peaks in the distribution of the trait that may lead to development of two different population. This kind of selection is very rare in nature. But it is important in bringing about evolutionary change.
BIOXII07:EVOLUTION
346507
Statement A : Variations due to gene flow changes allele frequency in future generation. Statement B : Gene flow occurs due to multiple gene migration
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both are correct.
BIOXII07:EVOLUTION
346508
The frequency of two alleles in a gene pool is 0.19 (1) and 0.81(1). Assume that the population is in Hardy-Weinberg equilibrium. The percentage of heterozygous individuals in the population is
1 0.81
2 0.31
3 0.19
4 1
Explanation:
According to the Hardy-Weinberg Equilibrium equation, heterozygotes are represented by the \(2 \mathrm{pq}\) term.Therefore, the number of heterozygous individuals \((\mathrm{Aa})\) is equal to \(2 \mathrm{pq}\) which equals \(2 \times 0.19 \times 0.81=0.31\) or \(31 \%\)
BIOXII07:EVOLUTION
346509
Assertion : Genetic drift refers to changes in the allele frequency occurring by chance Reason : Sampling error often lead to the elimination of certain alleles and fixation of other reducing genetic variability
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Genetic drift refers to elimination of genes of certain traits when a section of population migrates or dies, it will alter gene frequency of remaining population. Hence genetic drift is a mechanism of evolution that acts in concert with natural selection to change species characteristics over time.
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BIOXII07:EVOLUTION
346505
The allele frequency of ' A ' and ' a ' in a population are 0.6 and 0.4 respectively. The expected frequency of heterozygous individuals is:
1 \(48 \%\)
2 \(36 \%\)
3 \(16 \%\)
4 \(24 \%\)
Explanation:
In a population, autosomal dominant recessive inheritance can be expressed by Hardy-Weinberg. The simple algebraic expression is: \(\mathrm{p}^{2}+2 \mathrm{pq}+\mathrm{q}^{2}=1\) where, \(\mathrm{p}\) is the frequency of \(\mathrm{A}=0.6\) \(\mathrm{q}\) is the frequency of \(\mathrm{a}=0.4\) \(2 \mathrm{pq}\) is the frequency of \(\mathrm{Aa}\) (heterozygous individuals) \(=2 \times 0.6 \times 0.4=0.48\) Thus, the expected frequency of heterozygous individuals \(=48 \%\).
KCET - 2018
BIOXII07:EVOLUTION
346506
Assertion : Disruptive selection changes the population towards one particular direction Reason : This type of selection favours average sized individuals
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Disruptive type of selection favours both small sized and large sized individuals .It eliminates most of the members with mean expression,so produces two peaks in the distribution of the trait that may lead to development of two different population. This kind of selection is very rare in nature. But it is important in bringing about evolutionary change.
BIOXII07:EVOLUTION
346507
Statement A : Variations due to gene flow changes allele frequency in future generation. Statement B : Gene flow occurs due to multiple gene migration
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both are correct.
BIOXII07:EVOLUTION
346508
The frequency of two alleles in a gene pool is 0.19 (1) and 0.81(1). Assume that the population is in Hardy-Weinberg equilibrium. The percentage of heterozygous individuals in the population is
1 0.81
2 0.31
3 0.19
4 1
Explanation:
According to the Hardy-Weinberg Equilibrium equation, heterozygotes are represented by the \(2 \mathrm{pq}\) term.Therefore, the number of heterozygous individuals \((\mathrm{Aa})\) is equal to \(2 \mathrm{pq}\) which equals \(2 \times 0.19 \times 0.81=0.31\) or \(31 \%\)
BIOXII07:EVOLUTION
346509
Assertion : Genetic drift refers to changes in the allele frequency occurring by chance Reason : Sampling error often lead to the elimination of certain alleles and fixation of other reducing genetic variability
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Genetic drift refers to elimination of genes of certain traits when a section of population migrates or dies, it will alter gene frequency of remaining population. Hence genetic drift is a mechanism of evolution that acts in concert with natural selection to change species characteristics over time.
346505
The allele frequency of ' A ' and ' a ' in a population are 0.6 and 0.4 respectively. The expected frequency of heterozygous individuals is:
1 \(48 \%\)
2 \(36 \%\)
3 \(16 \%\)
4 \(24 \%\)
Explanation:
In a population, autosomal dominant recessive inheritance can be expressed by Hardy-Weinberg. The simple algebraic expression is: \(\mathrm{p}^{2}+2 \mathrm{pq}+\mathrm{q}^{2}=1\) where, \(\mathrm{p}\) is the frequency of \(\mathrm{A}=0.6\) \(\mathrm{q}\) is the frequency of \(\mathrm{a}=0.4\) \(2 \mathrm{pq}\) is the frequency of \(\mathrm{Aa}\) (heterozygous individuals) \(=2 \times 0.6 \times 0.4=0.48\) Thus, the expected frequency of heterozygous individuals \(=48 \%\).
KCET - 2018
BIOXII07:EVOLUTION
346506
Assertion : Disruptive selection changes the population towards one particular direction Reason : This type of selection favours average sized individuals
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Disruptive type of selection favours both small sized and large sized individuals .It eliminates most of the members with mean expression,so produces two peaks in the distribution of the trait that may lead to development of two different population. This kind of selection is very rare in nature. But it is important in bringing about evolutionary change.
BIOXII07:EVOLUTION
346507
Statement A : Variations due to gene flow changes allele frequency in future generation. Statement B : Gene flow occurs due to multiple gene migration
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both are correct.
BIOXII07:EVOLUTION
346508
The frequency of two alleles in a gene pool is 0.19 (1) and 0.81(1). Assume that the population is in Hardy-Weinberg equilibrium. The percentage of heterozygous individuals in the population is
1 0.81
2 0.31
3 0.19
4 1
Explanation:
According to the Hardy-Weinberg Equilibrium equation, heterozygotes are represented by the \(2 \mathrm{pq}\) term.Therefore, the number of heterozygous individuals \((\mathrm{Aa})\) is equal to \(2 \mathrm{pq}\) which equals \(2 \times 0.19 \times 0.81=0.31\) or \(31 \%\)
BIOXII07:EVOLUTION
346509
Assertion : Genetic drift refers to changes in the allele frequency occurring by chance Reason : Sampling error often lead to the elimination of certain alleles and fixation of other reducing genetic variability
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
Explanation:
Genetic drift refers to elimination of genes of certain traits when a section of population migrates or dies, it will alter gene frequency of remaining population. Hence genetic drift is a mechanism of evolution that acts in concert with natural selection to change species characteristics over time.