Genetics and Evolution (NEET Biology): Questions 83 - 88 of 154

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Question number: 83

» Genetics and Evolution » Heredity and Variation » Sex Determination-in Humans, Birds, Honey Bee

MCQ▾

Question

Sex determination in Drosophila melanogaster is based on

Choices

Choice (4) Response
a.

Pseudoalleles.

b.

X-Y chromosome mechanism.

c.

Genetic balance between the X-chromosome and autosomes.

d.

Chromosome – environment interaction.

Question number: 84

» Genetics and Evolution » Molecular Basis of Inheritance » Structure of DNA and RNA

MCQ▾

Question

Chemically DNA differs from RNA in having

Choices

Choice (4) Response
a.

All of the above.

b.

Ribose sugar instead of deoxyribose sugar

c.

Single strand

d.

Thymine in place of uracil.

Question number: 85

» Genetics and Evolution » Heredity and Variation » Chromosomal Disorders in Humans

MCQ▾

Question

Barr bodies (seen in saliva test in Olympic games) are found in human and are associated with

Choices

Choice (4) Response
a.

Female autosome

b.

Male sex chromosome

c.

Female sex chromosome

d.

Male autosome

Question number: 86

» Genetics and Evolution » Heredity and Variation » Mendelian Inheritance

MCQ▾

Question

While experimenting with the factor of tallness in Pisum satinum, Mendel obtained the results 73.97 % tall and 26.03 % dwarf from one of the cross. This shows that the parents are

Choices

Choice (4) Response
a.

Hybrid and hybrid tall plant.

b.

Hybrid tall and pure dwarf plant.

c.

Pure tall and pure dwarf plant.

d.

Hybrid tall and pure tall plant.

Question number: 87

» Genetics and Evolution » Heredity and Variation » Mendelian Inheritance

MCQ▾

Question

In F2 generation, a phenotypic ratio of 1: 1: 1: 1 exhibits

Choices

Choice (4) Response
a.

Back cross

b.

Monohybrid test cross

c.

Lethality

d.

Dihybrid test cross

Question number: 88

» Genetics and Evolution » Heredity and Variation » Linkage and Crossing Over

MCQ▾

Question

The percentage of crossing over will be more if

Choices

Choice (4) Response
a.

Linked genes are located far apart from each other

b.

Linked genes are located close to each other

c.

Genes are not linked

d.

Genes are located in a different cell

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