Gene inheritance

Question 1

What hold DNA in compact form?

Answer 1

Chromosomes

Question 2

What are the name of 1-22 chromosomes and 23 chromosomes?

Answer 2

1.1-22 chromosomes are autosomes inheritance
2.23 chromosome is X lined inheritance( sex chromosomes)
3.These determine whether you are a girl or boy

Question 3

What is a gene and how can they do homozygous?

Answer 3

A gene is a short segment of DNA that can encode for proteins
If both parent have the same gene it is called homozygous e.g Gene a

Question 4

What are the inheritance patterns?

Answer 4

1. If the mum has a functional gene and the dad has a change e.g T insted of G to will cause lose of function e.g because of this the red blood cell has a cresent shape and the child will be carrier of the disease
2. If both parent have that change in the code then the child will have the disease.

Question 5

What happens in the autosome dominant inheritance?

Answer 5

1. If the mum genes is functional and the dads gene has a gain of function gene coding, the child will have the disease because it is more dominant that the mum functional gene.

Question 6

Examples of autosome recessive diseases?

Answer 6

Sickle cell and cystic fibrous if each parent has one effected gene the child will have the disease.

Question 7

What hapens in sex-linked disease?

Answer 7

1. If the dads x gene has a mutation and the mum gene is functional the daughter will have the gene and the son will not have it or be a carrier.
2. This is because the Y in the XY chromosome doesnt hold anything so it does not matter.