Biology - Questions and Answers, General Study (GK)

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721.

The sex of a child is determined by the

(a)Chromosomes of the father

(b)Rh factor of the parents

(c)Blood group of the father

(d)Chromosomes of the mother

Comment

Answer is: A

722.

An organism that breeds true for a particular character producing identical gametes is called

(a)Homogamous

(b)Hemizygous

(c)Homozygous

(d)Heterozygous

Comment

Answer is: C

723.

Chromosomes not related to sex-inheritance are called

(a)Mesosomes

(b)Centrosomes

(c)Autosomes

(d)Allosomes

Comment

Answer is: C

724.

The cell undergoing a reduction division is called

(a)Meiocyte

(b)Gemt cell

(c)Oocyte

(d)Meiospore

Comment

Answer is: A

725.

The number of chromosomes in a normal human cell is ?

(a)45

(b)46

(d)44

Comment

Answer is: B

726.

In human beings, sex is determined by the sex chromosomes X and Y. What would, then, be the genetic constitution of a normal woman ?

(a)XO

(b)XY

(c)XX

(d)YY

Comment

Answer is: C

727.

What is the chromosome number in a human ovum ?

(a)44

(b)46

(d)None of these

Comment

Answer is: D

728.

Sons of a colour blind woman are always colour-blind but not the daughters. This suggests that :

(a)Fewer sex chromosomes are transferred to the daughters

(b)Sex-linked characters find immediate expression in man

(c)Sex chromosomes are transferred only from mother to son

(d)Sex is determined by the mother

Comment

Answer is: B

729.

The universal recipient blood group is

(a)A

(b)B

(c)AB

(d)O

Comment

Answer is: C

730.

In which one of the following is sex determined by environment ?

(a)Honeybee

(b)Bonnelia

(c)Papaya

(d)Maize

Comment

Answer is: B

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Biology - Questions and AnswersPage 73

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