Mendel's Dihybrid Experiments

Q.

The punnett square shown below represents the pattern of inhiritance in dihybrid cross when yellow (Y) is dominant over while (y) and Round (R) is dominant over wrinkled (r) seeds:

A plant of type 'H' will produce seeds with genotype identical to seeds produced by the plants of ?

1. Type P

2. Type N

3. Type M

4. Type J

Q.

The phenotypic ratio for Mendel’s dihybrid cross is

1. 3:1

2. 1:2:1

3. 9:3:3:1

4. 1:1

Q.

How many different phenotypes and genotypes are obtained in the $F_2$ generation of Mendel’s dihybrid cross?

1. 4 phenotypes and 9 genotypes

2. 4 phenotypes and 16 genotypes

3. 16 phenotypes and 8 genotypes

4. 2 phenotypes and 16 genotypes

Q.

In the above cross, what is the allelic composition of the female gamete?

1. (aB)

2. (Ab)

3. (ab)

4. (AB)

Q.

In a dihybrid cross AABB $\times$ aabb, $F_2$ progency of AABB, AABb, AaBB and AaBb accurs in ratio of________

1. 1: 1 : 1 : 1

2. 9 : 3 : 3 : 1

3. 1 : 2 : 2 : 1

4. 1 : 2 : 2 : 4

Q.

Mendel’s typical dihybrid cross is

1. YYRR × yyrr

2. YyRr × YyRr

3. YYRr × yyrr

4. yyrr × yyrr

Q.

A tall violet flowered plant (TTVV) is crossed with a dwarf white flowered plant (ttvv). When the $F_1$ plants are self pollinated, a total of 1600 $F_2$ plants are produced. Among them, how many plants are tall with white flowers?

1. 900

2. 100

3. 600

4. 300

Q.

The gametes produced by Mendel’s $F_1$ dihybrid are

1. (YR) and (Yr)

2. (YR), (Yr), (YR) and (yr)

3. (YR) and (yR)

4. (yR) and (Yr)

Q.

The ratio 9:3:3:1 represents:

1. Mendel’s dihybrid phenotypic ratio

2. Mendel’s monohybrid genotypic ratio

3. Mendel’s monohybrid phenotypic ratio

4. Mendel’s dihybrid genotypic ratio

Q.

A cross between pure-bred pea plants having yellow round seeds with those having green wrinkled seeds would produce ${\text{F}}_1$ plants with:

1. Round green seeds

2. Wrinkled green seeds

3. Wrinkled yellow seeds

4. Round yellow seeds