If the female has three boys in her first three pregnancy. What are the chances of getting female child this time?

(1) 25%

(2) 50%

(3) 75%

(4) 20%

In a test cross involving F₁ dihybrid flies, more parental-type offspring were produced than the recombinant type offspring. This indicates

(1) chromosomes failed to separate during meiosis 

(2) the two genes are linked and present on the same chromosome

(3) both of the characters are controlled by more than one gene

(4) the two genes are located on two different chromosomes

‘When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters’. This is the statement of:

1. Law of Dominance

2. Law of segregation

3. Law of Independent Assortment

4. Law of Linkage

An individual with AaBb genotype is producing four types of gametes as AB, aB, Ab and ab by meiosis. If the frequency of these gametes is 25% each then, it explains

1.  Incomplete linkage

2.  Mutations

3.  Independent assortment 

4.  Complete linkage 

Law of Independent Assortment is not applicable to 

(1) Linked genes

(2) Genes on different chromosomes

(3) Distantly located gene

(4) both (2) and (3)

What is probability of homozygous individuals for both characters in ${\mathrm{F}}_2$ generation of a dihybrid cross?

1.  1/2

2.  3/4

3.  1/3

4.  1/4 

When Mendel self hybridized F1 progeny of a dihybrid cross between pure Yellow Round seeded plants and Green Wrinkled plants, he observed that yellow and green colour segregated in a ratio of: