DNA

Question 1

Who discovered DNA?

Answer 1

Watson and Crick in 1953 with the help of Rosalind Franklin and Maurice Wilkins

Question 2

What are chromosomes?(3)

Answer 2

Chromosomes are structures found inside the nuclei of cells.
These contain long strips of DNA.
Our body contains 23 pairs(46 total) of chromosomes.

Question 3

What does DNA do?

Answer 3

Stores the genetic information in genes which codes proteins which determines characteristics of an organism.

Question 4

Where do chromosomes come from?

Answer 4

From both gametes sperm and egg cell which each carry 23 chromosomes. When fused, the zygote contains 46 chromosomes.

Question 5

Describe the structure of DNA

Answer 5

-> sugar phosphate backbone
-> double helix
-> 4 base pairs:
Cytosine-Guanine
Thymine- Adenine

Question 6

Alleles

Answer 6

A version of a gene (we get two copies of each gene)

Question 7

Dominant allele

Answer 7

Capital letter in a punnet table. The gene that will always pass to the next generation.

Question 8

Recessive allele

Answer 8

Normal letter in punnet table. The gene that will be less probable to pass onto the next generation.