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Genetics MCQ - Multiple Choice Question and Answer

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

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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
25.6
26
26.5