Inheritance Patterns & Mutations

1.With the help of pedigree charts describe the various modes of inheritance involving the sex chromosomes. Give suitable examples for each type

1.Mendelian inheritance

1.Describe the principle of genetic counselling

2.Autosomal dominant inheritance

3.Explain autosomal dominant inheritance in genetic diseases

1.Two diseases showing autosomal dominant inheritance

2.Name two autosomal recessive disorders

1.Features of X-linked recessive inheritance are

• 1) Both males and females can carry the affected gene
• 2) Only females are affected
• 3) Achondroplasia is an example
• 4) Hemophilia is an example
• a) 1, 3, 4
• b) 2, 3
• c) 1, 3
• d) 1, 4

2.Mitochondrial DNA in humans is

• a) Exclusively inherited maternally
• b) Exclusively inherited paternally
• c) Inherited both paternally and maternally
• d) Not inherited