342368
Which of the following statements is not true of two genes that show 50 % recombination frequency?
1 The genes may be on different chromosomes
2 The gene show independent assortment
3 If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis
4 The genes are tightly linked
Explanation:
The two genes which exhibit 50 % recombination frequency are tightly linked. When two genes are close together on the same chromosome, are called linked genes and they do not assort independently. While genes based on distinct chromosomes assort independently and have a recombination frequency of 50%, linked genes have a recombination frequency that is less than 50%. Though independent assortment is not shown by the linked genes but they remain together and are inherited all together producing only parental type of progeny.
AIPMT - 2013
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342369
Morgan found that the genes white and yellow were _________and showed only _____ recombination
1 Very loosely linked, 98.7 per cent
2 Very tightly linked, 1.3 per cent
3 Very loosely linked, 1.3 per cent
4 Very tightly linked, 98.7 per cent
Explanation:
Morgan found that the genes white and yellow were very tightly linked and showed only 1.3 per cent recombination.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342370
Linkage means
1 Chemical association of genes on a chromosome
2 Biochemical association of genes on a chromosome
3 Physiological association of genes on a chromosome
4 Physical association of genes on a chromosome
Explanation:
Linkage means Physical association of genes on a chromosome
342368
Which of the following statements is not true of two genes that show 50 % recombination frequency?
1 The genes may be on different chromosomes
2 The gene show independent assortment
3 If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis
4 The genes are tightly linked
Explanation:
The two genes which exhibit 50 % recombination frequency are tightly linked. When two genes are close together on the same chromosome, are called linked genes and they do not assort independently. While genes based on distinct chromosomes assort independently and have a recombination frequency of 50%, linked genes have a recombination frequency that is less than 50%. Though independent assortment is not shown by the linked genes but they remain together and are inherited all together producing only parental type of progeny.
AIPMT - 2013
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342369
Morgan found that the genes white and yellow were _________and showed only _____ recombination
1 Very loosely linked, 98.7 per cent
2 Very tightly linked, 1.3 per cent
3 Very loosely linked, 1.3 per cent
4 Very tightly linked, 98.7 per cent
Explanation:
Morgan found that the genes white and yellow were very tightly linked and showed only 1.3 per cent recombination.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342370
Linkage means
1 Chemical association of genes on a chromosome
2 Biochemical association of genes on a chromosome
3 Physiological association of genes on a chromosome
4 Physical association of genes on a chromosome
Explanation:
Linkage means Physical association of genes on a chromosome
342368
Which of the following statements is not true of two genes that show 50 % recombination frequency?
1 The genes may be on different chromosomes
2 The gene show independent assortment
3 If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis
4 The genes are tightly linked
Explanation:
The two genes which exhibit 50 % recombination frequency are tightly linked. When two genes are close together on the same chromosome, are called linked genes and they do not assort independently. While genes based on distinct chromosomes assort independently and have a recombination frequency of 50%, linked genes have a recombination frequency that is less than 50%. Though independent assortment is not shown by the linked genes but they remain together and are inherited all together producing only parental type of progeny.
AIPMT - 2013
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342369
Morgan found that the genes white and yellow were _________and showed only _____ recombination
1 Very loosely linked, 98.7 per cent
2 Very tightly linked, 1.3 per cent
3 Very loosely linked, 1.3 per cent
4 Very tightly linked, 98.7 per cent
Explanation:
Morgan found that the genes white and yellow were very tightly linked and showed only 1.3 per cent recombination.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342370
Linkage means
1 Chemical association of genes on a chromosome
2 Biochemical association of genes on a chromosome
3 Physiological association of genes on a chromosome
4 Physical association of genes on a chromosome
Explanation:
Linkage means Physical association of genes on a chromosome
342368
Which of the following statements is not true of two genes that show 50 % recombination frequency?
1 The genes may be on different chromosomes
2 The gene show independent assortment
3 If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis
4 The genes are tightly linked
Explanation:
The two genes which exhibit 50 % recombination frequency are tightly linked. When two genes are close together on the same chromosome, are called linked genes and they do not assort independently. While genes based on distinct chromosomes assort independently and have a recombination frequency of 50%, linked genes have a recombination frequency that is less than 50%. Though independent assortment is not shown by the linked genes but they remain together and are inherited all together producing only parental type of progeny.
AIPMT - 2013
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342369
Morgan found that the genes white and yellow were _________and showed only _____ recombination
1 Very loosely linked, 98.7 per cent
2 Very tightly linked, 1.3 per cent
3 Very loosely linked, 1.3 per cent
4 Very tightly linked, 98.7 per cent
Explanation:
Morgan found that the genes white and yellow were very tightly linked and showed only 1.3 per cent recombination.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342370
Linkage means
1 Chemical association of genes on a chromosome
2 Biochemical association of genes on a chromosome
3 Physiological association of genes on a chromosome
4 Physical association of genes on a chromosome
Explanation:
Linkage means Physical association of genes on a chromosome
