Biology

Question 1

1Human gametes contain

Easy

A. 23 chromosomes B. 22 chromosomes C. 44 chromosomes D. 46 chromosomes

Question 2

2The number of chromosomes in a human body cell is ___.

Easy

Your answer (fill in the blank)

Question 3

3Genes for different traits found on the same chromosome are said to be

Medium

A. dominant B. linked C. recessive D. independent

Question 4

4Down syndrome is caused by

Easy

A. a Y chromosome B. an extra chromosome 21 C. extra X D. missing X

Question 5

5Albinism is due to a lack of

Easy

A. melanin B. keratin C. insulin D. haemoglobin

Question 6

6The human female has sex chromosomes ___.

Easy

Your answer (fill in the blank)

Question 7

7Down syndrome is caused by an extra chromosome.

Easy

A. True B. False

Question 8

8Down syndrome is also called trisomy ___.

Easy

Your answer (fill in the blank)

Question 9

9Human body cells contain how many chromosomes?

Easy

A. 23 B. 44 C. 48 D. 46

Question 10

10Turner syndrome has the sex chromosomes

Medium

A. XXY B. XO C. XXX D. XYY