Dna

Question 1

How many chromosomes does a human body contain?

Answer 1

46/23 pairs - one of each from the mother and father

Question 2

How many gametes (sperm and egg cells) does a human body hold?

Answer 2

23

Question 3

What are chromosomes made of?

Answer 3

Very long molecules of DNA coiled tightly together

Question 4

What are genes?

Answer 4

Short sections of DNA that code for a specific protein. Proteins determine the characteristics of the organism.

Question 5

What is DNA?

Answer 5

(deoxyribonucleic acid) - the molecule that carries the coded instructions for life

Question 6

What is DNA made of?

Answer 6

Nucleotides composed of a sugar, phosphate and base. The bases are a, t, c, g. A and t can only go with each other - same with c and g

Question 7

Who was Rosalind Franklin?

Answer 7

Produced high quality photos so she could collect data ot show the structure of DNA.

Question 8

Who was Maurice Wilkins?

Answer 8

Worked at King’s college and worked out how to make thread s of DNA.

Question 9

Who were James Watson and Francis Crick?

Answer 9

Worked at Cambridge uni, didn’t have any results but got others including Franklin’s to figure out DNA’s structure. They favoured building models over experimental work