Inheritance of sex & sex linkage (Edexcel GCSE Biology Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many pairs of chromosomes do human body cells have?
How many pairs of chromosomes do human body cells have?
23 pairs
Which pair of chromosomes carries the sex determining genes?
Which pair of chromosomes carries the sex determining genes?
The 23rd pair
What fraction of genetic information do gametes contain compared to the parent?
What fraction of genetic information do gametes contain compared to the parent?
Which statement about gametes and sex chromosomes is correct?
Which statement about gametes and sex chromosomes is correct?
All mother's gametes contain X chromosomes
What is the chromosome combination for males?
What is the chromosome combination for males?
XY
What is the probability of a child being male?
What is the probability of a child being male?
50%
Why are sex-linked disorders most common in men?
Why are sex-linked disorders most common in men?
They only have one X chromosome
What function does the second X chromosome have for females regarding sex-linked disorders?
What function does the second X chromosome have for females regarding sex-linked disorders?
Acts as a 'protective' function
How many copies of the recessive allele do women need to be colour blind?
How many copies of the recessive allele do women need to be colour blind?
Two copies
How is haemophilia inherited?
How is haemophilia inherited?
Same way as colour blindness