Inherited Disorders (GCSE Biology)

In a population, the frequency of an allele changes over time because individuals with that allele leave more offspring. What is this process called?

In pedigree analysis, a disease that appears in every generation and affects both sexes equally is most likely to be inherited how?

Which of the following is an ethical concern commonly raised about genetic screening and testing for inherited disorders?

Which of the following is a likely effect of a mutation in a gene encoding haemoglobin?

A genetic test detects whether an unborn foetus has inherited two copies of a recessive disease allele. What type of test that samples cells from the placenta is commonly used for this purpose during pregnancy?

Gene therapy aims to treat inherited disorders by delivering a healthy gene to patient cells. What is a common vehicle used to carry the therapeutic gene into human cells?

What is the best description of a dominant allele?

Haemophilia is an X-linked recessive disorder. Which child of a carrier mother and an unaffected father is most likely to have haemophilia?

Which term describes a person who carries a recessive disease allele but does not show the disease symptoms?

What is a likely consequence of inbreeding (mating of close relatives) in small populations regarding inherited disorders?

A scientist finds a new inherited disorder in a family and wants to show the disorder is caused by a single gene mutation. Which evidence would best support a single-gene inheritance pattern?