(a) What would be the ratio of chromosome number between an egg and its zygote?
(b) Distinguish between a gamete and a zygote.
(a) The ratio of chromosome number between an egg and its zygote is 1:2.
In human beings, the egg cell is haploid and the zygote is diploid in nature.
(b) Gamete means a haploid sex cell which is sperm in males and egg (oocyte) in females. These gametes fertilized to form a zygote.
A zygote is a diploid cell formed through the fertilization between an egg and a sperm. Zygote further divides to form an embryo.
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- DIRECTIONS: Read the passage(s) given below and answer the questions that follow. Passage- The cell which results after fusion of gametes is called a zygote. The fusion of male and female gametes (to form a zygote) is called fertilization. The zygote develops into an embryo. The cell which results after fusion of male gametes and female gametes is called(a) zygote(b) fertilization(c) embryo(d) none of these
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- Which of the following statements is/are false?a. The male gamete is larger, with a nucleus and more cytoplasm than the female gamete. b. The fusion of the two gametes is called fertilization. c. The product of fusion of the two gametes is called the zygote.(a) Only a(b) Only a and b(c) Only b(d) Only b and c(e) Only c
- In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote?
- The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.(a) What are chromosomes (i) B (ii) D, and (iii) E? (b) Out of B, D and E, which two chromosomes are of the same type? (c) Which chromosome is smaller in size? (d) What is the general name of chromosomes such as B and E? (e) Out of the two persons A and C, which one is (i) male, and (ii) female?
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