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Sex Determination

Fill in the f...

Question

Fill in the following blanks with suitable words

$X$ and $Y$ chromosomes are called chromosomes.

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Solution

The two chromosomes that determine an offspring's (or baby's) sex are referred to as sex chromosomes.

So, $X$ and $Y$ chromosomes are called sex chromosomes.

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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.

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

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

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

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Sex Determination

Standard VIII Biology

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