Question 1

When complementary genes interact, what is the possible genotype of the progeny resulting from a cross between two heterozygous individuals?

Accepted Answer

1 RR:2 Rr:1 rr

Answer

3 RR:1 rr

Answer

2 RR:2 Rr:2 rr

Answer

1 RR:1 Rr:1 rr

Answer

2 Rr:1 rr

Question 2

What is the term used to describe the phenomenon in which two different genes control the expression of a single trait?

Accepted Answer

Complementary gene action

Answer

Polygenic inheritance

Answer

Incomplete dominance

Answer

Epistasis

Answer

Codominance

Question 3

When two complementary genes interact, what is the phenotypic ratio of the F2 generation in a dihybrid cross?

Accepted Answer

9:7

Answer

1:2:1

Answer

9:3:3:1

Answer

3:4:1

Answer

3:1

Question 4

In complementary genes, what is the relationship between the dominant and recessive alleles?

Accepted Answer

One is dominant over the other

Answer

They exhibit co-dominance

Answer

They have no effect on each other

Answer

They are equal in strength

Answer

They always segregate independently

Question 5

What term describes a phenomenon where the presence of one gene can mask the expression of another gene?

Accepted Answer

Epistasis

Answer

Polygenic inheritance

Answer

Incomplete dominance

Answer

Codominance

Answer

Pleiotropy

Question 6

When complementary genes interact, what is the typical phenotypic ratio seen in the offspring?

Accepted Answer

9:7

Answer

3:1

Answer

9:3:3:1

Answer

1:2:1

Answer

1:1

Question 7

In a dihybrid cross involving complementary genes, what phenotypic ratio would you expect in the offspring?

Accepted Answer

9:7

Answer

3:3:2

Answer

3:1

Answer

12:3:1

Answer

1:2:1

Question 8

What is the term used to describe the interaction between complementary genes where both alleles are needed for the expression of a trait?

Accepted Answer

Epistasis

Answer

Incomplete dominance

Answer

Polygenic inheritance

Answer

Pleiotropy

Question 9

Which of the following represents a pair of complementary genes?

Accepted Answer

Rr

Answer

RR

Answer

RrRr

Answer

rr

Answer

rrrr

Question 10

In genetics, what term refers to a pair of genes where one is dominant and the other is recessive?

Accepted Answer

Complementary genes

Answer

Epistatic genes

Answer

Co-dominant genes

Answer

X-linked genes