Sessioin 7 (Genotype, Phenotype And Inheritance)

Question 1

Give an example of an autosomal recessive disease

Answer 1

Cystic fibrosis

Question 2

Give an example of an autosomal dominant disease

Answer 2

Huntingtons

Question 3

Give an example of an X linked disease

Answer 3

Haemophilia

Question 4

Give an example of a polygenic inheritance disease

Answer 4

Albinism

Question 5

Name the type of inheritance:

Skips generation, M/F equally affected, heterozygous unaffected

Answer 5

Autosomal recessive

Question 6

Name the type of inheritance:

Cannot skip generations, M/F equally affected, heterozygous affected

Answer 6

Autosomal dominant

Question 7

Name the type of inheritance:

Cannot skip generations, males only affected

Answer 7

Y-Linked

Question 8

Name the type of inheritance:

Cannot skip generations, M/F equally affected, hemizygous males/heterozygous females affected

Answer 8

X linked dominant

Question 9

Name the type of inheritance:

Skips generations, affects more males, hemizgygous males/homozygous females affected

Answer 9

X linked recessive

Question 10

How is mitochondrial DNA passed on?

Answer 10

From the mother

Question 11

What is polygenic inheritance?

Answer 11

Occurs when a phenotype involves more than 1 gene

Question 12

What are the 2 types of polygenic inheritance?

Answer 12

Linked- genes on the same chromosome, no independent assortment, recombination frequency is dependent on the distance between the genes

Not linked- genes on different chromosomes, independent assortment ratio= 1:1:1:1