184592
Mental retardation in man associated with sex chromosomal abnormality is usually due to
1 reduction in \(\mathrm{X}\) complement
2 increase in \(\mathrm{X}\) complement
3 moderate increase in \(\mathrm{Y}\) complement
4 large increase in \(\mathrm{X}\) complement
Explanation:
Mental retardation in a man is associated with X-linked recessive inheritance. In the case of Xlinked disorders, males are most heavily affected compared to females. Females with one affected Xchromosome and one normal X-chromosome tend to have milder symptoms.
AMU-2002
Principle of Inheritance and Variation
184593
Sex chromosomes of male bird are
1 \(X Y\)
2 \(\mathrm{ZW}\)
3 \(\mathrm{XX}\)
4 \(\mathrm{ZZ}\)
Explanation:
In birds, the sex chromosomes of a male are denoted as ZZ, and for females, it's ZW. This is the opposite of the sex chromosome system found in mammals like humans.
MHT CET-08.10.2020 Shift-I
Principle of Inheritance and Variation
184594
'Sex-determination', in humans is identified by
1 Somatic cell \(\rightarrow\) autosomes
2 Germ cell \(\rightarrow\) sex chromosomes
3 Germ cell \(\rightarrow\) autosomes
4 Somatic cell \(\rightarrow\) sex chromosomes
Explanation:
Sex determination in humans is determined by the sex chromosomes in germ cells. Males have a one \(\mathrm{X}\) and one \(\mathrm{Y}\) chromosomes (XY), while female have two \(\mathrm{X}\) - chromosomes (XX). The combination of these chromosomes at fertilization determines the sex of the offspring.
GUJCET-2023
Principle of Inheritance and Variation
184595
A boy receives his \(\mathrm{X}\)-chromosome from
1 his mother only
2 his father only
3 Both father and mother
4 Either mother or father
Explanation:
Sex determination in humans is primarily determined by the combination of sex chromosomes found in the germ cells (sperm and egg). In a fertilization event, the combination of an \(\mathrm{X}\) or \(\mathrm{Y}\) chromosome from the sperm (contributed by the male) and an \(\mathrm{X}\) chromosome from the egg (contributed by the female) determines the sex of the offspring.
184592
Mental retardation in man associated with sex chromosomal abnormality is usually due to
1 reduction in \(\mathrm{X}\) complement
2 increase in \(\mathrm{X}\) complement
3 moderate increase in \(\mathrm{Y}\) complement
4 large increase in \(\mathrm{X}\) complement
Explanation:
Mental retardation in a man is associated with X-linked recessive inheritance. In the case of Xlinked disorders, males are most heavily affected compared to females. Females with one affected Xchromosome and one normal X-chromosome tend to have milder symptoms.
AMU-2002
Principle of Inheritance and Variation
184593
Sex chromosomes of male bird are
1 \(X Y\)
2 \(\mathrm{ZW}\)
3 \(\mathrm{XX}\)
4 \(\mathrm{ZZ}\)
Explanation:
In birds, the sex chromosomes of a male are denoted as ZZ, and for females, it's ZW. This is the opposite of the sex chromosome system found in mammals like humans.
MHT CET-08.10.2020 Shift-I
Principle of Inheritance and Variation
184594
'Sex-determination', in humans is identified by
1 Somatic cell \(\rightarrow\) autosomes
2 Germ cell \(\rightarrow\) sex chromosomes
3 Germ cell \(\rightarrow\) autosomes
4 Somatic cell \(\rightarrow\) sex chromosomes
Explanation:
Sex determination in humans is determined by the sex chromosomes in germ cells. Males have a one \(\mathrm{X}\) and one \(\mathrm{Y}\) chromosomes (XY), while female have two \(\mathrm{X}\) - chromosomes (XX). The combination of these chromosomes at fertilization determines the sex of the offspring.
GUJCET-2023
Principle of Inheritance and Variation
184595
A boy receives his \(\mathrm{X}\)-chromosome from
1 his mother only
2 his father only
3 Both father and mother
4 Either mother or father
Explanation:
Sex determination in humans is primarily determined by the combination of sex chromosomes found in the germ cells (sperm and egg). In a fertilization event, the combination of an \(\mathrm{X}\) or \(\mathrm{Y}\) chromosome from the sperm (contributed by the male) and an \(\mathrm{X}\) chromosome from the egg (contributed by the female) determines the sex of the offspring.
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Principle of Inheritance and Variation
184592
Mental retardation in man associated with sex chromosomal abnormality is usually due to
1 reduction in \(\mathrm{X}\) complement
2 increase in \(\mathrm{X}\) complement
3 moderate increase in \(\mathrm{Y}\) complement
4 large increase in \(\mathrm{X}\) complement
Explanation:
Mental retardation in a man is associated with X-linked recessive inheritance. In the case of Xlinked disorders, males are most heavily affected compared to females. Females with one affected Xchromosome and one normal X-chromosome tend to have milder symptoms.
AMU-2002
Principle of Inheritance and Variation
184593
Sex chromosomes of male bird are
1 \(X Y\)
2 \(\mathrm{ZW}\)
3 \(\mathrm{XX}\)
4 \(\mathrm{ZZ}\)
Explanation:
In birds, the sex chromosomes of a male are denoted as ZZ, and for females, it's ZW. This is the opposite of the sex chromosome system found in mammals like humans.
MHT CET-08.10.2020 Shift-I
Principle of Inheritance and Variation
184594
'Sex-determination', in humans is identified by
1 Somatic cell \(\rightarrow\) autosomes
2 Germ cell \(\rightarrow\) sex chromosomes
3 Germ cell \(\rightarrow\) autosomes
4 Somatic cell \(\rightarrow\) sex chromosomes
Explanation:
Sex determination in humans is determined by the sex chromosomes in germ cells. Males have a one \(\mathrm{X}\) and one \(\mathrm{Y}\) chromosomes (XY), while female have two \(\mathrm{X}\) - chromosomes (XX). The combination of these chromosomes at fertilization determines the sex of the offspring.
GUJCET-2023
Principle of Inheritance and Variation
184595
A boy receives his \(\mathrm{X}\)-chromosome from
1 his mother only
2 his father only
3 Both father and mother
4 Either mother or father
Explanation:
Sex determination in humans is primarily determined by the combination of sex chromosomes found in the germ cells (sperm and egg). In a fertilization event, the combination of an \(\mathrm{X}\) or \(\mathrm{Y}\) chromosome from the sperm (contributed by the male) and an \(\mathrm{X}\) chromosome from the egg (contributed by the female) determines the sex of the offspring.
184592
Mental retardation in man associated with sex chromosomal abnormality is usually due to
1 reduction in \(\mathrm{X}\) complement
2 increase in \(\mathrm{X}\) complement
3 moderate increase in \(\mathrm{Y}\) complement
4 large increase in \(\mathrm{X}\) complement
Explanation:
Mental retardation in a man is associated with X-linked recessive inheritance. In the case of Xlinked disorders, males are most heavily affected compared to females. Females with one affected Xchromosome and one normal X-chromosome tend to have milder symptoms.
AMU-2002
Principle of Inheritance and Variation
184593
Sex chromosomes of male bird are
1 \(X Y\)
2 \(\mathrm{ZW}\)
3 \(\mathrm{XX}\)
4 \(\mathrm{ZZ}\)
Explanation:
In birds, the sex chromosomes of a male are denoted as ZZ, and for females, it's ZW. This is the opposite of the sex chromosome system found in mammals like humans.
MHT CET-08.10.2020 Shift-I
Principle of Inheritance and Variation
184594
'Sex-determination', in humans is identified by
1 Somatic cell \(\rightarrow\) autosomes
2 Germ cell \(\rightarrow\) sex chromosomes
3 Germ cell \(\rightarrow\) autosomes
4 Somatic cell \(\rightarrow\) sex chromosomes
Explanation:
Sex determination in humans is determined by the sex chromosomes in germ cells. Males have a one \(\mathrm{X}\) and one \(\mathrm{Y}\) chromosomes (XY), while female have two \(\mathrm{X}\) - chromosomes (XX). The combination of these chromosomes at fertilization determines the sex of the offspring.
GUJCET-2023
Principle of Inheritance and Variation
184595
A boy receives his \(\mathrm{X}\)-chromosome from
1 his mother only
2 his father only
3 Both father and mother
4 Either mother or father
Explanation:
Sex determination in humans is primarily determined by the combination of sex chromosomes found in the germ cells (sperm and egg). In a fertilization event, the combination of an \(\mathrm{X}\) or \(\mathrm{Y}\) chromosome from the sperm (contributed by the male) and an \(\mathrm{X}\) chromosome from the egg (contributed by the female) determines the sex of the offspring.