Linkage

Question 1

What is linkage?

Answer 1

Linkage means that genes are located on the same chromosome

Question 2

Why can it be said that linked genes do not show independent assortment?

Answer 2

As linked genes tend to be passed on together (forming a linkage group) to the next generation

Question 3

What does it mean if alleles R and S are linked?

Answer 3

This means that these genes occupy different loci on the same chromosome

Question 4

What is sex linkage?

Answer 4

Sex linkage means that a characteristic is controlled by a gene on a sex (or X) chromosome

Question 5

What are the sex chromosomes in humans?

Answer 5

X and Y

Question 6

Which sex chromosome is the largest?

Answer 6

X

Question 7

Which sex chromosome carries the most amount of genes?

Answer 7

X

Question 8

What can sex-linked characteristics also be called?

Answer 8

X-linked

Question 9

What controls sex-linked characteristics?

Answer 9

Genes or alleles located on the X chromosome

Question 10

Why is it said that mothers control sex-linked characteristics?

Answer 10

As females with the genotype XNXn can produce the gametes XN and Xn however the male can only provide the Y chromosome which determines the sex
Therefore the female provides the N which is dominant for sex-linked characteristic.