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IGCSE Biology Extended17.1.11—Diploid nucleus as a nucleusTopic Practice

17.1.11—Diploid nucleus as a nucleus

• Describe a diploid nucleus as a nucleus containing two sets of chromosomes

Question 2(a)

[Maximum number: 1]

The Indian muntjac deer, Muntiacus muntjak, is recorded as the mammal with the lowest number of chromosomes.

Fig. 2.1 is an image of the chromosomes in the nucleus of a diploid cell of a female muntjac deer.

Fig. 2.1

Fig. 2.1

State the diploid number of chromosomes for the female muntjac deer.

Question 28

[Maximum number: 1]

The diploid number in Ovis aries (sheep) is 54.
How many chromosomes will there be in a zygote of this species?

A

0

B

27

C

54

D

108

Question 30

[Maximum number: 1]

What is a diploid nucleus?

A

a nucleus containing one set of chromosomes

B

a nucleus containing two sets of chromosomes

C

a nucleus with one double helix of DNA

D

a nucleus with two genes

Question 31

[Maximum number: 1]

An organism is heterozygous for a gene with the alleles T and t .
Which diagram represents a diploid cell from this organism?

A
Question image
B
Question image
C
Question image
D
Question image

Question 31

[Maximum number: 1]

Which statement about a diploid human cell is correct?

A

There are 22 chromosomes and an X or a Y chromosome.

B

There are 22 pairs of chromosomes and two sex chromosomes.

C

There are 23 chromosomes.

D

There are 23 pairs of chromosomes and two sex chromosomes.

Question 6(c)(iii)

[Maximum number: 1]

Fig. 6.2 shows a plant tissue in which cells are dividing by mitosis.

Fig. 6.2

Fig. 6.2

Cell J in Fig. 6.2 is an example of a diploid cell.

State what is meant by the term diploid.

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