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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
(c)47
(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
(c)48
(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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