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Question 1 of 20
1. Question1 point(s)
Some features of cell division are listed.
- haploid cells are produced
- new cells are genetically identical
- reduction division
- results in variation
Which features would be associated with meiosis?CorrectIncorrect
Question 2 of 20
2. Question1 point(s)
Sickle-cell anaemia is an inherited disease.
Which genotypes represented in the diagram would increase an individual’s resistance to malaria?CorrectIncorrect
Question 3 of 20
3. Question1 point(s)
Cystic fibrosis is an inherited disease. The allele for cystic fibrosis is recessive.
A woman is heterozygous and her partner is homozygous dominant.
What is true of any children they produce?CorrectIncorrect
Question 4 of 20
4. Question1 point(s)
Which graph shows the correct change in mass of DNA in one cell during cell division by mitosis?CorrectIncorrect
Question 5 of 20
5. Question1 point(s)
Cell X contains 16 chromosomes. It divides by meiosis.
How many chromosomes do each of the new cells contain?CorrectIncorrect
Question 6 of 20
6. Question1 point(s)
What happens as a result of meiosis?CorrectIncorrect
Question 7 of 20
7. Question1 point(s)
Why is the allele for sickle-cell anaemia common in some parts of the world?CorrectIncorrect
Question 8 of 20
8. Question1 point(s)
The diagram shows the chromosomes in the nucleus of a cell that divides by mitosis.
Which diagram shows the chromosomes in the nucleus of one of the daughter cells produced?
Question 9 of 20
9. Question1 point(s)
The diploid number for mice is 40 chromosomes.
How many chromosomes will be in a mouse cell formed by meiosis?CorrectIncorrect
Question 10 of 20
10. Question1 point(s)
Which statement is correct?CorrectIncorrect
Question 11 of 20
11. Question1 point(s)
During protein synthesis, what is the function of the ribosome?CorrectIncorrect
Question 12 of 20
12. Question1 point(s)
The table shows some inherited features.
Which features show co-dominance?
sex A ✓ ✓ x B ✓ x x C x ✓ ✓ D x ✓ x
✓ = co-dominant
x = not co-dominantCorrectIncorrect
Question 13 of 20
13. Question1 point(s)
In some animals, B is the allele for normal skin (without spots) and b is the allele for spotted skin.
A pair of these animals has 37 offspring, 18 with spots and 19 without.
What are the most likely genotypes of the parents?CorrectIncorrect
Question 14 of 20
14. Question1 point(s)
Which type of reproduction and which type of cell division produces nuclei with half the number of chromosomes?
type of cell
A asexual meiosis B asexual mitosis C sexua1 meiosis D sexual mitosisCorrectIncorrect
Question 15 of 20
15. Question1 point(s)
The diagram shows a family tree and the inheritance of the ability to taste a certain substance.
The allele for the ability to taste this substance is dominant.
Which statement about the genotypes of the sisters Mary and Jeanne is correct?CorrectIncorrect
Question 16 of 20
16. Question1 point(s)
What are the chromosomes for the two sexes in human beings?
female male A XX XY B XX YY C XY XX D YY XYCorrectIncorrect
Question 17 of 20
17. Question1 point(s)
The colour of a mouse’s fur is controlled by a single pair of alleles.
A mouse with black fur was crossed with a mouse with white fur. All the offspring had black fur.
What would be the most likely ratio in several litters of offspring if two of these black offspring were crossed?
black fur white fur A 1 3 B 2 2 C 3 1 D 4 0CorrectIncorrect
Question 18 of 20
18. Question1 point(s)
A pure-breeding white mouse was crossed with a pure-breeding black mouse. All their offspring were black.
Then, one of the offspring was bred with a pure-breeding white mouse. They produced 10 baby mice.
What are the most likely colours of these mice?CorrectIncorrect
Question 19 of 20
19. Question1 point(s)
How does a haploid nucleus differ from a diploid nucleus of the same species?CorrectIncorrect
Question 20 of 20
20. Question1 point(s)
Most birds have a coloured pigment in their feathers, but in a few individuals, pigment is absent and the birds are albinos.
Albinism occurs when a bird is homozygous recessive for the gene which creates the coloured pigment.
If two albino birds mated, what describes the appearance of their offspring?CorrectIncorrect