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

50% of the male gametes have only autosomes and the rest 50% have both autosomes and one sex chromosomes in

1. Grasshopper

2. Drosophila

3. Birds

4. Butterflies

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’

Heterogametes are produced by

1. Human female

2. Female grasshopper

3. Female Drosophila

4. Female bird

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

Chromosome component in the person affected from Klinefelter syndrome will be

1. 44 + XX

2. 44 + XXY

3. 44 + XY

4. 44 + XO