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MDCAT Biology Chapter 9 Life process in Animals & Plants Online Test MCQs With Answers

Question # 1

A change in one or more bases of DNA, which results in the formation of an abnormal protein is

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Moulting

Transformation

Mutation

Fission

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Question # 2

What are chances for having Rh-ve baby if one parent is Rh+ve and (homozygous) and other is Rh-ve

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25%

50%

100%

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Question # 3

Which phenomenon reduces the chances of genetic recombination and variations among offspring ?

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linkage

crossing over

independent assortment

dominance

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Question # 4

Blood pressure is also an example of _______ trait

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Multifactorial

Qualitative

Single genic

Both a & b

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Question # 5

What happens when both alleles of a gene pair independently express in a heterozygote?

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dominance

incomplete dominance

over dominance

codominance

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Question # 6

Point mutation occurs in

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Sickle cell anemia

Phenylketonuria

Alkaptonuria

All

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Question # 7

Anti-Rh antibodies appear in plasma

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During first few months

During last months

Only when stimulated

If Rh⁺individual mistakenly receives Rh^-blood

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Question # 8

How may gene pairs contribute to the wheat grain colour?

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one

two

three

four

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Question # 9

Sickle cell mutation affects

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One beta chain

Both beta chains

Only alpha chain

None of the alpha or beta chain

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Question # 10

Who for the first time found white eye mutant in drosophila ?

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Morgan

Bridges

Correns

De Varies

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Question # 11

Which of the following traist is transmitted directly from an affected to only its sons?

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autosomal

X-linked

Y-linked

X and Y linked

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