Sex Linkage

Question 1

Sex Linkage

Answer 1

• patters of inheritance exhibited by alleles on the X-chromosome
• one sex has two copies of the gene, the other only has one
• heterogamemtic sex can express a recessive trait with only one copy of the recessive allele

Question 2

Criss-cross inheritance

Answer 2

-reciprocal crosses produce different results

Question 3

Pedigrees

Answer 3

Eliminate modes of inheritance NOT possible:

1) autosomal recessive
2) autosomal dominant
3) sex-linked recessive
4) sex-linked dominant

Question 4

Sex-linked symbols

Answer 4

• Always include the chromosome because we are dealing with TWO traits
• X^w+, X^w, Y