Genetics MCQ Question with Answer

Genetics MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 1
The scientists who rediscovered the Mendel's laws are

Mast and Pantin

Watson and Crick

Corren, Tschermark and Hugo de Vries

Khorana and Nirenberg

Question No : 2
The chromosomal theroy of heredity implies that

chromosomes are composed of DNA and protein

genes are composed of chromosomes

organism cannot live withoutchromosomes

genes are located on the chromosomes and are transmitted to the next generation through them.

Question No : 3
Colour blindness is caused due to

deficiency of vitamic C

sex-linked abnormality

absence of rods in retina

absence of visual purple in retina

Question No : 4
In a monohybrid cross the Fi ratio of a backcross is

1:1

3:1

1:2:1

9:3:3:3

Question No : 5
Among the following which is a test cross?

TtxTt

TTxTT

TTxTt

Ttxtt

Question No : 6
The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of

all heterozygous tall

two tall and two dwarf

one homozygous tall, two heterozygous tall and one homozygous dwarf

all homozygous dwarf.

Question No : 7
How many meiosis will be required to produce 102 pollen-grains ?

25.6

26.5