Types Of Mendelian Inheritance

Question 1

Autosomal recessive

Answer 1

Phenotype can skip generations
Both parents must be carriers
Affects males and females

Question 2

Autosomal dominant

Answer 2

Phenotype appears in every generation

Affects males and females equally

Question 3

X-linked recessive

Answer 3

More males than females are affected because males with only one mutant allele are hemizygous

Transmission through unaffected carrier female
-half of sons are affected, half of daughters carriers - no daughters are affected

Transmission through hemizygous affected male
-all daughters are carries, no one affected

Transmission through affected female
-all sons will be affected and all daughters will be carriers

Question 4

X-linked dominant

Answer 4

Affected males pass on the condition to all daughters by to none of their sons
Affected females with unaffected male partners pass the condition to half sons and half daughters

Question 5

Y-linked inheritance

Answer 5

Male to male transmission

Males are always affected. No females affected