4.6.1.8 Sex determination

Question 1

How many pairs of chromosomes do ordinary human bodies cells contain?

Answer 1

• 23 pairs

Question 2

How many pairs carry the genes that determine sex?

Answer 2

• 22 pairs control characteristics but one of the pairs carries the gene that determines sex

Question 3

What are the chromosomes in a female?

Answer 3

• In females sex chromosomes are the same (XX)

Question 4

What are the chromosomes in a male?

Answer 4

• In males the chromosomes are different (XY)