17.6 Sex linkage

Question 1

sex chromosomes in females

Answer 1

XX

Question 2

sex chromosomes in males

Answer 2

XY

Question 3

all female gametes contain

Answer 3

a single X chromosome

Question 4

male gametes contain

Answer 4

either a X chromosome or Y chromosome

Question 5

sex inheritance punnet square

Answer 5

female male gametes
gametes X Y
X XX XY
X XX XY

50% male
50% female

Question 6

2 of our 46 sex chromosomes are..

Answer 6

sex hromosomes

Question 7

why do most sex linked traits tend to be on the X chromosome?

Answer 7

it is Larger than the Y chromosome. it therefore contains more genes

Question 8

example of a X linked recessive disorder

Answer 8

haemophillia

Question 9

why are men more likely to get haemophillia

Answer 9

more likely there will be no dominant allele to counteract the recessive allele

Question 10

in an X linked disorder the allele/gene does not show on the…

Answer 10

Y chromosome