Genes and inheritance

Question 1

What is DNA

Answer 1

DNA is a molecule found in the nucleus of cells that holds genetic information of a organism

Question 2

What are chromosomes

Answer 2

Chromosones are structures that are made of DNA.

Question 3

How is a gemete formed

Answer 3

when chromosomes duplicate then get divided up into gametes

Question 4

What are gametes

Answer 4

Gametes are sex cells . They fuse together in fertilisation as part of sexual reproduction.

Question 5

What are genes

Answer 5

Genes are lengths of DNA on chromosomes that code for specific proteins.

Question 6

What are Alleles

Answer 6

Alleles are different versions of the same gene. Individuals will inherit an allele for each gene from their mother and their father.

Question 7

What are the two types of Alleles

Answer 7

Recessive
Dominant

Question 8

How many pairs of chromozones do human body cells have

Answer 8

23 pairs of chromozones

Question 9

Describe the genetic difference between male and female

Answer 9

Males have an X and a Y chromosome.

Females have two X chromosomes.

Question 10

How is there a 50% chance of having a boy or a girl

Answer 10

In males, when sperm are made in meiosis, the X and the Y chromosomes get separated into different gametes. This means there is a 50% chance that a sperm has an X chromosome and and 50% chance that a sperm has a Y chromosome.

Question 11

Why dont offspring look exactly like one of their parents

Answer 11

The offspring inherit genes from both of their parents