State true or false with reason that "The fertilizedhuman egg has half the number of chromosomes of the body cells .

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Solution

False.
Zygote is diploid and is formed by the fertilisation of male and female haploid gametes. Thus, it contain the same number of chromosomes as that of the body cells.

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Q. Mention whether the following statements are True or False. Give reason in support of your answer. [5 MARKS]
(a) As you grow from childhood to adulthood, your skin cells divide only to replace such cells that are lost from the surface.
(b) The unfertilized human egg has half the number of chromosomes of the body cells.
(c) Nuclear membrane in a mitotically dividing cell remains intact up to the metaphase and disappears only in telophase.
(d) Mitotic cell division can be a mode of reproduction.
(e) Crossing-over between chromatids can occur only between homologous chromosomes.

Mention whether the following statements are true (T) or false (F). Give reason in support of your answer.
(a) As you grow from childhood to adulthood, your skin cells divide only to replace such cells that are lost from the surface. (T/F)
(b) The unfertilised human egg has half the number of chromosomes of the body cells. (T/F)
(c) Nuclear membrane in a mitotically dividing cell remains intact up to the metaphase and disappears only in the telophase. (T/F)
(d) Mitotic cell division can be a mode of reproduction. (T/F)
(e) Crossing-over between chromatids can occur only between homologous chromosomes. (T/F)

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(a) Unicellular organisms have one-celled body.
(b) Muscle cells are branched.
(c) Amoeba has irregular shape.
(d) All the cells in our body are alike.
(e) A hen's egg is a group of cells.
(f) The basic living unit of an organism is organ.

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Q. If root cell has 42 chromosomes then the number of chromosome in egg is

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State true or false with reason that "The fertilizedhuman egg has half the number of chromosomes of the body cells .

False. Zygote is diploid and is formed by the fertilisation of male and female haploid gametes. Thus, it contain the same number of chromosomes as that of the body cells.

False.
Zygote is diploid and is formed by the fertilisation of male and female haploid gametes. Thus, it contain the same number of chromosomes as that of the body cells.