A man with blood group ‘A’ marries a woman with blood group ‘B’. If their child has blood group ‘O’ then what could be their genotype?

1. Both are homozygous

2. Man is homozygous while woman is heterozygous

3. Both are heterozygous

4. Man is heterozygous while woman is homozygous

Chromosome component in the person affected from Klinefelter syndrome will be

1. 44 + XX

2. 44 + XXY

3. 44 + XY

4. 44 + XO

The total number of pure lines prepared by Mendel for his hybridization experinent in garden pea plant for seven characters were

1. 7

2. 14

3. 2

4. 22

Heterogametes are produced by

1. Human female

2. Female grasshopper

3. Female Drosophila

4. Female bird

In a person suffering from sickle-cell anaemia, the template strand of sickle-cell Hb(s) gene has a specific nitrogenous base sequence that codes for valine amino acid. The base sequence on template strand is

1. 5’-CAC-3’

2. 5’-GAG-3’

3. 3’-CAG-5’

4. 3’-CAC-5’

Presence of more than two alleles for a gene is known as

1. Polygenic inheritance

2. Multiple allelism

3. Co-dominance

4. Incomplete dominance

Males produce two types of gametes in

1. Butterflies

2. Birds

3. Drosophila

4. Moth

In pedigree analysis, the symbol for affected male is

1. 

2. 

3. 

4. 

Sex of progeny is determined by female parent in

1. Drosophila

2. Bird

3. Human

4. Grasshopper

Genes for which of the following characters in Drosophila were found to be very tightly linked by Morgan?

1. Eye colour and wing size

2. Body colour and wing size

3. Wing colour and eye colour

4. Body colour and eye colour