WorksheetsSex determination and sex linkage
Total questions: 15
Worksheet time: 39mins
1. The term used to describe the number of chromosomes in an egg or sperm cell is
A. diploid
B. gamete
C. haploid
D. zygote
2. Cells are formed by the division of existing cells. Four different cells are shown.
Which cell is produced by meiosis?
A. Nerve cell
B. Sperm cell
C. Palisade cell
D. White blood cell
3. Albinism is an inherited condition in which pigment does not develop in the skin, hair and eyes. The allele for albinism is recessive.
What are the chances of albino parents having an albino child?
A. 0%
B. 25%
C. 75%
D. 100%
4. Which structure will be found in the nucleus of a body cell in a woman?
A. X allele
B. X chromosome
C. Y allele
D. Y chromosome
5. Which statement about the human sex chromosomes is correct?
A. All boys have two Y chromosomes.
B. Everybody has at least one X chromosome.
C. Girls have a Y chromosome and an X chromosome.
D. Nobody has two X chromosomes.
6. A man has three daughters.
What is the chance of his next child being a daughter?
A. 0%
B. 25%
C. 50%
D. 75%
7. Which sex chromosomes are present in all mature human sperm cells?
A. both X and Y chromosomes
B. either X or Y chromosomes
C. only X chromosomes
D. only Y chromosomes
8. The diagram shows the chromosomes from one person.
What can be deduced about the person who has these chromosomes?
A. a female with Down’s syndrome
B. a male with Down’s syndrome
C. a normal female
D. a normal male
9. The diagram shows the fusion of gametes to produce a son and a daughter.
What are the sex chromosomes in gamete Q and son R?
A. Q -X R - XX
B. Q - X R - XY
C. Q- Y R - XX
D. Q- Y R - XY
10. Sickle cell anaemia is determined by the gene Hb. HbA is the allele for normal blood. HbS is the allele for sickle cell anaemia.
Which combination of parents could result in some children with resistance to malaria and some with all normal red blood cells?
A. HbA HbA HbA HbA
B. HbA HbA HbA HbS
C. HbA HbA HbS HbS
D. HbS HbS HbS HbS
11. Gametes are produced by the process of ------------
A. mitosis
B. meiosis
C. crossing-over
D. replication
12. Chromosomes that determine the body characteristics -------------------------------
A. Allosomes
B. Autosomes
C. Karyotype
D. Sex linkage
13. Which of the following genotype shows the female who is the carrier for Haemophilia?
A. Xh Xh
B. XH XH
C. XH Xh
D. Xh Y
14. In the inheritance of ABO blood groups, when two parents have the genotypes IAIA and IAIo, what is the blood group of their offspring?
A. group A
B. group AB
C. group B
D. group O
15. What determines the sex of a baby?
A. the father’s blood group
B. the father’s chromosomes
C. the mother’s blood group
D. the mother’s chromosomes
