Sex Determination in Humans (Leaving Cert Biology): Quizzes

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Sex Determination in Humans
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How many chromosomes do humans have in total?

46

What are somatic cells?

Body cells that don't produce gametes

How many pairs of autosomes do humans have?

22 pairs

Which chromosome is larger?

X chromosome

How many genes does the Y chromosome contain?

Fewer than 100 genes

What is the sex chromosome combination for females?

XX

What is the sex chromosome combination for males?

XY

Which parent determines the sex of the child?

The father

What chromosome do all egg cells carry?

X chromosome

What chromosomes can sperm cells carry?

Either X or Y

When is sex determined?

At fertilisation

Which sex is called the heterogametic sex?

Males

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