Sex Linkage (AQA A-Level Biology): Quizzes
📚Quizzes
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10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many pairs of homologous chromosomes do humans have?
How many pairs of homologous chromosomes do humans have?
22 pairs
What is the sex chromosome composition in human males?
What is the sex chromosome composition in human males?
XY
Why does the X chromosome carry more genes than the Y chromosome?
Why does the X chromosome carry more genes than the Y chromosome?
X is much longer
What types of gametes do males produce regarding sex chromosomes?
What types of gametes do males produce regarding sex chromosomes?
50% X and 50% Y gametes
Where are most sex-linked genes located?
Where are most sex-linked genes located?
X chromosome
Why are males more susceptible to X-linked recessive conditions?
Why are males more susceptible to X-linked recessive conditions?
They have only one X chromosome
What does haemophilia affect in the body?
What does haemophilia affect in the body?
Blood clotting
What is a carrier female for haemophilia?
What is a carrier female for haemophilia?
What offspring result from normal female () × haemophiliac male ()?
What offspring result from normal female () × haemophiliac male ()?
50% carrier females, 50% normal males
Can a haemophiliac male pass the condition to his sons?
Can a haemophiliac male pass the condition to his sons?
No, sons inherit his Y