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In genetics, what is meant by sex linkage? In humans a sex-linked recessive allele c is responsible for red-green colour blindness - Leaving Cert Biology - Question 5 - 2007

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In genetics, what is meant by sex linkage? In humans a sex-linked recessive allele c is responsible for red-green colour blindness. Complete the blank spaces above... show full transcript

Worked Solution & Example Answer:In genetics, what is meant by sex linkage? In humans a sex-linked recessive allele c is responsible for red-green colour blindness - Leaving Cert Biology - Question 5 - 2007

Step 1

In genetics, what is meant by sex linkage?

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Answer

Sex linkage refers to the association of genes with sex chromosomes. Specifically, it involves genes that are located on the sex chromosomes (X or Y). Such genes exhibit inheritance patterns that differ based on the sex of the individual. For example, the X chromosome carries many genes, including those related to specific traits that may be expressed differently in males and females.

Step 2

Parents

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Answer

X Y

Step 3

Gametes

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X c Y c

Step 4

F1

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X c X c Y c Y c

Step 5

Phenotypes:

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Answer

Sex: Female Female Male Male

Vision: Colour blind Normal Colour blind Normal

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