Variation and Genetics Mcqs

This Set of Multiple choice questions and answers focuses on study of Variation and Genetics in Biology. These questions are chosen from a collection of most authoritative and best reference books on Biology. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Medicine industry job interviews. One should practice our Mcqs to assimilate knowledge on Variation and Genetics comprehensively.

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1.
In which of the following cases, genotypic and phenotypic ratio will remain same in F2 generation

Law of independent assortment

Law of Segregation

Test cross

Incomplete dominance.

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2.
A pure breeding tall pea plant was crossed to dwarf plant what will be the frequency of dwarf plants in F1

0.25

0.5

0.75

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4.
How many pairs of homologous chromosomes are present in Pisum sativum

Five pairs

Six pairs

Seven pairs

Eight pairs.

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5.
Which of the following characters of pea plant is dominant?

Axial flowers

Yellow pods

White flowers

Wrinkled seeds

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6.
A pea plant with yellow seed was crossed to a plant having green seeds. What will happen in F1; if plants are true breeding

All seeds will be yellow

Half of seeds will be yellow

All the seeds will be green

Both will be present in ratio of 1:2:1

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11.
A pure breeding tall plant was crossed to dwarf plant. What would be probability of “Tt” genotype in F2

0.25

0.5

0.75

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12.
A monohybrid cross yielded 3:1 in F2. What could be mode of inheritance?

Segregation

Independent assortment

Both of these

None of these

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13.
If a heterozygous individual shows the complete effect of both alleles, the type of inheritance would be

Complete dominance

Non dominance

Incomplete dominance

Co-Dominance

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