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Genes

Fill in the f...

Question

Fill in the following blanks with suitable words:

Each normal body cell in humans contains pairs of chromosomes out of which pair is of sex chromosomes.

A

23

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B

1

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Solution

Each normal body cell in humans contains $23$ pairs of chromosomes.

Out of these $23$ pairs, $22$ pairs are autosomes and $1$ pair ( $X$ and $Y$ chromosomes) is sex chromosomes.

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Similar questions

Q. Fill in the following blanks with suitable words :
(a) Genes always work in ................ .
(b) In pea plants, the gene for dwarfness is ..............whereas that for tallness is ............ .
(c) Most people have ............earlobes but some have ............earlobes.
(d) A human gamete contains.............. chromosomes whereas a normal body cell has .......... chromosomes in it.
(e) All races of man have...........blood groups.
(f) The...............chromosomes for a ............are XX whereas that for a ..............are XY.

Fill in the following blanks with suitable words :

(a) Genes always work in ............ .

(b) In pea plants , the gene for dwarfness is ........... whereas that for tallness is ............. .

(c) Most people have ....... earlobes but some have ....... earlobes.

(d) A human gamete contains ........ chromosomes whereas a normal body cell has ....... chromosomes in it.

(e) All races of man have ...... blood groups.

(f) The ....... chromosomes for a ........ are XX whereas that for a .......... are XY.

The normal body cell of an organism contains 28 pairs of chromosomes. The number of chromosomes present in its germ cell will be :
(a) 28
(b) 14
(c) 56
(d) 42

Q. Fill in the following blanks with suitable words :

(d) A human gamete contains ......................... chromosomes whereas a normal body cell has ..................... chromosomes in it.

Mention the following:

(i) Total number of pairs of chromosomes in each body cell in humans ____

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