IB Biology Topic 3.2 Chromosomes Notes & Questions (SL/HL)

Question 1

SLPaper 1A

Which sex chromosome(s) can be found in a human ovum?

Question 2

SLPaper 1A

Which is a characteristic of the pairs of sister chromatids that are visible during meiosis?

Question 3

SLPaper 1A

What is a difference between two alleles of a gene?

Question 4

SLPaper 2

The image shows the chromosomes from a body cell of an adult human.

(a)

Identify, with a reason, the sex of this individual.

[1]

(b)

Identify the chromosome that is affected by a trisomy in this individual, naming the condition that this trisomy gives rise to.

[1]

Question 5

HLPaper 1A

Which individuals are colour blind in this Punnett grid?

	$X^{B}$	$Y$
$X^{B}$	$X^{B} X^{B}$	$X^{B} Y$
$X^{b}$	$X^{B} X^{b}$	$X^{b} Y$

IB Biology 3.2 Chromosomes Questionbank