1Where are chromosomes found in the body?
2What is a chromosome made up of?
3What is the role of genes in a living being's body?
4Do all living beings possess chromosomes?
5How many pairs of sex chromosomes are found in the human cell? (1 pair, 22 pairs, 23 pairs, 46 pairs)
6What is a chromosome made up of? (DNA and RNA, DNA and carbohydrate, DNA and protein, RNA and protein)
7What is the main function of sex chromosomes? (to determine physical characteristics, to determine sex, to increase immunity, to determine the structure of the eye)
8What is the smallest unit of the chromosome that helps in the transmission of hereditary characteristics? (DNA, chromatid, centromere, gene)
9Which of the following indicates the set of chromosomes in a cell of a woman? (44+XY, 44+XX, 22+XY, 22+XX)
10Which of the following statements is true? (Ovum contains only a Y chromosome and sperm contains an X chromosome; ovum contains only an X chromosome and sperm contains a Y chromosome; ovum contains only an X chromosome and sperm contains either an X or Y chromosome; ovum and sperm both contain X and Y chromosomes)
11Write the differences between autosome and sex chromosome.
12Write the differences between haploid and diploid.
13Give reason: Offspring have the same characteristics as their parents.
14Give reason: The male has a main role in the determination of sex.
15Give reason: Though males have both X and Y sex chromosomes, some of them have only male or only female kids.
16What is a gene?
17What is a chromosome? Clarify the role of chromosomes in the body of living beings.
18Clearly explain the role of genes in the transmission of hereditary characteristics in organisms.
19How is sex determined in humans? Explain with a chart.
20A woman is pregnant. What is her probability of giving birth to a daughter? Write in percent.
21A couple gave birth to only a son. Does it mean that the testes of that male produce sperms having Y chromosomes only?
22What are chromatids, sister chromatids and the centromere?
23Why is the number of chromosomes expressed in pairs?
24What would happen if gametes were not haploid?