How Biological Sex is Determined

Females have two X chromosomes (XX).

Males have one X and one Y chromosome (XY).

Sperm can carry either an X or a Y, while all eggs carry an X.

Question 1

What is an allele?

Accepted Answer

A different version of the same gene

Answer

A type of cell division

Answer

A section of cytoplasm

Answer

A complete set of chromosomes

Question 2

Which statement accurately describes genetic inheritance at a GCSE level?

Accepted Answer

Correct pedagogical fact about inheritance

Answer

Common misconception about inheritance

Answer

Incorrect scale or unit

Answer

Irrelevant detail

Question 3

Which statement accurately describes genetic inheritance at a GCSE level?

Accepted Answer

Correct pedagogical fact about inheritance

Answer

Common misconception about inheritance

Answer

Incorrect scale or unit

Answer

Irrelevant detail

Question 4

What is meant by a dominant allele?

Accepted Answer

An allele expressed when only one copy is present

Answer

An allele found only in males

Answer

An allele that destroys a recessive allele

Answer

An allele that is always more common in a population

What is How Biological Sex is Determined?