Biology

Question 1

1An organism with two identical alleles for a trait is

Easy

A. homozygous B. hybrid C. heterozygous D. dominant

Question 2

2The F1 generation is the

Easy

A. parental generation B. second filial generation C. first filial generation D. gamete generation

Question 3

3Mendel's first law states that

Easy

A. genes are on X chromosomes B. alleles separate during gamete formation C. genes are linked D. all traits blend

Question 4

4Blood group is controlled by

Easy

A. sex chromosomes B. mutation C. a single pair only D. multiple alleles

Question 5

5Codominance is shown by

Medium

A. blood group AB B. blood group O C. sickle cell trait only D. albinism

Question 6

6A person with genotype IAi has blood group

Easy

A. AB B. O C. B D. A

Question 7

7The observable characteristic is the

Easy

A. phenotype B. gene C. genotype D. allele

Question 8

8The genotypic ratio from Tt × Tt is

Easy

A. 1 TT : 2 Tt : 1 tt B. 3 : 1 C. 2 : 1 D. 1 : 1

Question 9

9A homozygous recessive shows the recessive phenotype.

Easy

A. True B. False

Question 10

10The cross Tt × Tt gives a phenotypic ratio of

Easy

A. 3 : 1 B. 1 : 1 C. 1 : 2 : 1 D. 9 : 3 : 3 : 1