L20

Question 1

In chickens,…

Answer 1

Heterogametic = female
Homogametic = male rooster

Question 2

Hemizygous

Answer 2

Can only have one X chromosome

Question 3

Why are females less prone to be affected by X-linked traits?

Answer 3

Have an extra X that acts as a safety net, the dominant allele masks the affected recessive allele

Question 4

How many genes in Humans

Answer 4

20,000

Question 5

How many linked genes on chromosomes

Answer 5

1000 linked per chromosomes

Question 6

Linked genes

Answer 6

Fail to seperate during crossing over, cross over together, mostly stay together but some recombinants can occur (crossing over)

Question 7

recombination frequency

Answer 7

(recombination no.)/(total no. of gametes)

Question 8

Fewer recombinants mean….

Answer 8

The genes are linked