GENES CHROMOMSES AND DNA

Question 1

HOW MANY CHROMOSOMES DOES THE HUMAN CELL CONTAIN?

Answer 1

23 pairs

Question 2

What does the nucleus contain?

Answer 2

the nucleus contains your genetic material

Question 3

What is an allele?

Answer 3

A different version of a gene

Question 4

What are genes?

Answer 4

Genes are instructions for making proteins

Question 5

Put the following in order from biggest to smallest DNA,CHROMOSOMES,NUCLEUS,GENES

Answer 5

Nucleus, chromosomes, genes, DNA

Question 6

What is a genotype?

Answer 6

A genetic makeup of an organism or all of the gens it has

Question 7

what is a phenotype?

Answer 7

The characteristics that an organism displays

Question 8

What characteristics are only caused by the environment?

Answer 8

scars

Question 9

what characteristics are caused by inheritance

Answer 9

eye colour, dimples

Question 10

What characteristics are caused by both the environment and genes

Answer 10

skin colour, weight, intelligence

Question 11

What is the male chromosome

Answer 11

XY The y chromosome causes male characteristics

Question 12

What is the female chromosome

Answer 12

XX

Question 13

What are structural proteins part of

Answer 13

skin, hair, blood and the cyptoplasm

Question 14

What is an example of a structural protein?

Answer 14

Collagen it is found in tendons bones and the cartilage

Question 15

What is an example of a functional protein?

Answer 15

Enzymes. Amylase is a functional protein which breaks down starch to maltose

Question 16

How many chromosomes do sex cells have?

Answer 16

23 single before reproduction

Question 17

explain how the y chromosome causes the offspring develop into a male?

Answer 17

The y chromosomes carries a gene which enables the offspring to develop male characteristics. the gene is called SRY and a protein is produced to cause the development of testes instead of ovaries.