Ch 8

Question 1

Determining…

Autosomal Recessive

What are special about this pattern? Give an example.

Answer 1

does skip generations, 2 affected parents will have affected children (homozygous recessive)
-e.g Cystic fibrosis

Question 2

Determining…

Autosomal Dominant

What are special about this pattern? Give an example.

Answer 2

does not skip generations, all affected children will have one/two affected parent (hetero/homozygous dominant), no affected parents means no affected children (homozygous recessive)
-e.g dwarfism

Question 3

Determining…

X-linked Recessive

What are special about this pattern? Give an example.

Answer 3

does skip generations, affected parents will always have affected children, affected female=affected father, affected female=affected sons
-e.g colour blindness, haemophilia

Question 4

Determining…

X-linked Dominant

What are special about this pattern? Give an example.

Answer 4

does not skip generations, affected fathers will always have affected daughters
-e.g Rett syndrome

Question 5

Determining…

Y-linked

What are special about this pattern? Give an example.

Answer 5

does not skip generations, only in males, all males have the same phenotype
-e.g Y chromosome infertility