Mendel’s Law of independent assortment holds good for genes situated on the:

1. non-homologous chromosomes

2. homologous chromosomes

3. extra nuclear genetic element

4. same chromosome

Mother and father of a person with ‘O’ blood group have ‘A’ and ‘B’ blood group, respectively. What would be the genotype of both mother and father?

1. Mother is homozygous for ‘A’ blood group and father is heterozygous for ‘B’

2. Mother is heterozygous for ‘A’ blood group and father is homozygous for ‘B’

3. Both mother and father are heterozygous for ‘A’ and ‘B’ blood group, respectively

4. Both mother and father are homozygous for ‘A’ and ‘B’ blood group, respectively

Linkage map of X-chromosome of fruitfly has 66 map units with yellow body gene(y) at one end & bobbed hair (b) at the other. The recombination frequency between y and b gene would be
1. 66%
2. > 50%
3. 50%
4. 100%

A harmful condition which is also a potential saviour from a mosquito borne infectious disease
1. Thalassemia
2. Sickle cell anaemia
3. Leukemia
4. Pernicious anaemia

One of the genes present exclusively on the X-chromosome in humans is concerned with
1. Baldness
2. Red-green color blindness
3. Facial hair/moustaches in males
4. Night blindness

Self fertilising trihybrid plants form
1.Eight different gametes and 64 different zygotes
2. Four different gametes and sixteen different zygotes
3. Eight different gametes and sixteen different zygotes
4. Eight different gametes and thirty two different zygotes

A normal woman whose father was colour blind is married to normal visioned man. Their sons would be
1. 75% colour blind
2. 50% colour blind
3. 100% colour blind
4. All normal.

For finding the different types of gametes produced by genotype AaBb, it should be crossed with genotype
1. AABB
2. aabb
3. AaBb
4. aaBB.

A normal couple has seven children (2 daughters and 5 sons). Three of the sons suffer from a hereditary disorder but none of the daughters is affected. Which is the inheritance type
1. Sex-limited recessive
2. Autosomal dominant
3. Sex-linked dominant
4. Sex-linked recessive.

A woman with normal vision but with colorblind father marries a colorblind man. The fourth child of the couple is a boy. This boy
1. May or may not be colorblind
2. Must be colorblind
3. Must have normal vision
4. Will be partially colorblind due to being heterozygous