Sex Linkage (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is sex linkage?
What is sex linkage?
A gene on a sex chromosome
What sex chromosomes do females have?
What sex chromosomes do females have?
XX
What sex chromosomes do males have?
What sex chromosomes do males have?
XY
Which is an example of a sex-linked trait in humans?
Which is an example of a sex-linked trait in humans?
Red-green colour blindness
Where are most sex-linked trait genes located?
Where are most sex-linked trait genes located?
X chromosome
Why are sex-linked traits more common in males?
Why are sex-linked traits more common in males?
Males need only one recessive gene
How many recessive genes must a female have to express a sex-linked trait?
How many recessive genes must a female have to express a sex-linked trait?
Two
What is a carrier female?
What is a carrier female?
Has one normal & one abnormal allele
What is the genotype of a carrier female for colour vision?
What is the genotype of a carrier female for colour vision?
What is the genotype of a colour blind male?
What is the genotype of a colour blind male?
What is the genotype of a colour blind female?
What is the genotype of a colour blind female?
In a cross of × , what % of offspring are colour blind males?
In a cross of × , what % of offspring are colour blind males?
25%