GCSE - Gcse Biology - Unit 2 - Genetics Solution

Q.1.

In a recessive condition, such as cystic fibrosis, how many copies of the abnormal allele are needed for the person to be a sufferer?

Q.2.

Sperm cells carry which of the following chromosomes?

Q.3.

If the genes were Tt, this means that the alleles are...

Q.4.

What are alleles?

Q.5.

Humans have two sex chromosomes. What are the ones in women known as?

Q.6.

What is a carrier?

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A person who has the disease and always passes it on to their offspring
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A person who is unaffected by the disease but can pass on the gene
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A person unaffected and incapable of passing on the condition through their genes
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A person infected who can spread the disease through a droplet infection

Q.7.

What offspring ratio would you expect from two parents who are carriers - Tt crossed with Tt?

Q.8.

What is the name of the technique used to test a foetus for genetic disorders?

Q.9.

For a condition such as Huntington's disease, how many parents need to be affected for the children to inherit this condition?

Q.10.

In humans, genes are found in...