Relationship between DNA, chromosomes, gene, allele

Question 1

Explain DNA

Answer 1

DNA is a double helix that carries the genetic information of an organism.

Question 2

What are chromosomes made out of and how many to we have in the human body?

Answer 2

Chromosome are made out of DNA and protein. We have 46 chromosomes in our body

Question 3

Explain allele

Answer 3

allele is an alternative form of a gene, e.g, blue eyes

Question 4

Explain gene

Answer 4

A gene is a section of DNA that codes for a specific characteristic, e.g., the colour of an eye.

Question 5

Define recessive alleles

Answer 5

This is a type of allele that, when present on its own, won’t affect the individual. Two copies of the alleles need to be present for the phenotype to be expressed.

Question 6

Define dominant allele

Answer 6

Only one copy of the dominant allele is required to express the trait.