Genes W, X, Y and Z are linked on the same chromosome. The following are the cross-over values between the genes. W and X-38% W and Y-26% X and Z-16% Y and Z-4%The sequence of genes on the chromosome is .....

GENETIC BASIS OF INHERITANCE

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Genes W, X, Y and Z are linked on the same chromosome. The following are the cross-over values between the genes. W and X-38% W and Y-26% X and Z-16% Y and Z-4%The sequence of genes on the chromosome is ____

A	W Y Z X
B	W Z Y X .
C	Y Z X W
D	X Z Y W .

Explanation:

Detailed explanation-1: -Genes that are lo ca ted on the same chromosome are calle d linked genes. Alleles for these genes tend to segregate together during meiosis, unless they are separated by crossing-over. Crossing-over occurs when two homologous chromosomes exchange genetic material during meiosis I.

Detailed explanation-2: -Haplotype. A haplotype refers to a set of DNA variants along a single chromosome that tend to be inherited together. They tend to be inherited together because they are close to each other on the chromosome, and recombinations between these variants are rare.

Detailed explanation-3: -So, the correct answer is ‘Linked genes’.

Detailed explanation-4: -Unlinked genes may be on different chromosomes, or so far apart on the same chromosome that they are often separated by recombination. If two genes are inherited together more than 50% of the time, this is evidence that they are linked on the same chromosome.

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NEET BIOLOGY

GENETICS AND EVOLUTION

GENETIC BASIS OF INHERITANCE