The best example of pleiotropy is:

1.	Skin color	2.	Phenylketonuria
3.	Colour Blindness	4.	ABO Blood group

In antirrhinum, two plants with pink flowers were hybridized. The F₁ plants produced red, pink, and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridization? Red flower colour is determined by RR, and White by rr genes.

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

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

Sex of progeny is determined by female parent in

1. Drosophila

2. Bird

3. Human

4. Grasshopper

In pedigree analysis, the symbol for affected male is

1. 

2. 

3. 

4. 

Males produce two types of gametes in

1. Butterflies

2. Birds

3. Drosophila

4. Moth

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

1. Polygenic inheritance

2. Multiple allelism

3. Co-dominance

4. Incomplete dominance

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