6. Inheritance Patterns

Question 1

What are the six inheritance patterns?

Answer 1

1. autosomal recessive
2. autosomal dominant
3. mitochondrial
4. Y-linked
5. X-linked recessive
6. X-linked dominant

Question 2

What is autosomal dominant?

Answer 2

single copy of the allele will confer that trait or disease phenotype

Question 3

What is autosomal recessive?

Answer 3

two copies of the allele are required for the affected phenotype

Question 4

What is mitochondrial pattern of inheritance?

Answer 4

traits that are inherited via the mitochondrial genome

Question 5

What is hemizygosity?

Answer 5

individual only has one copy of the chromosome in a diploid organism

Question 6

What are sex-linked traits?

Answer 6

traits that are determined by genes located on the X or Y chromosome

Question 7

How are Y-linked traits passed to offspring?

Answer 7

male parent to male offspring

Question 8

What are characteristics of X-linked dominant traits?

Answer 8

hardest to identify, will normally affect males more than females

Question 9

What are characteristics of X-linked recessive traits?

Answer 9

tend to affect males more than females and can skip generations