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

Question # 1

Blood pressure is also an example of _______ trait

Choose an answer

Multifactorial

Qualitative

Single genic

Both a & b

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Question # 2

In sickle cell beta chain glutamic acid is replaced by valine which is sixth amino acid from

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N-Terminal

C-Terminal

R-Terminal

H-Terminal

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Question # 3

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 # 4

In case of sickle cell anemia, in place of glutamic acid, _________ is found

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Histidine

Valine

Proline

Leucine

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Question # 5

Which enzyme deficiency leads to phenylketonuria

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Phenylalanine oxidase

Phenylalanine hydroxylase

Phenylalanine synthase

Phenylalanine carboxylase

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Question # 6

Pseudo-autosomal genes are present on

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X-chromosome

Y-chromosome

Both a & b

Autosomes

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Question # 7

A heterrozygote offspring quantitatively exceeds the phenotypic expression of both the homozygote parents due to:

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dominance

incomplete dominance

over dominance

codominance

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Question # 8

Point mutation occurs in

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Sickle cell anemia

Phenylketonuria

Alkaptonuria

All

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Question # 9

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 # 10

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 # 11

If the distance of 20 map units is found among two linked loci what would be the percentage of cross gametes

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40%

60%

20%

10%

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