Humans have 46 chromosomes. How many chromosomes will their sperm and egg have?

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Solution

The correct option is A
23

Humans have 46 chromosomes in all their somatic cells (body cells: all cells other than sex cells). Thus, the body cells have both the sets of chromosomes i.e. they are diploid. But the sex cells, egg and sperm, are haploid ie. only one set of chromosomes is present in them. So, egg and sperm of humans will have only 23 chromosomes.

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Humans have 46 chromosomes. How many chromosomes will their sperm and egg have?

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Fill in the blanks
(a) Mitosis occurs in our ..... cells.
(b) Mitosis produces two daughter cells whereas meiosis produces ...... daughter cells.
(c) Meiosis occurs only in ..... cells.
(d) Modern humans have 46 chromosomes. Their sperms and eggs will have......chromosomes each.
(e) During the pairing of chromosomes in meiosis, the ...... chromosomes come to lie side by side.
(f) The.......(s) are surrounded by radiating rays and termed as aster.

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