Y9 Genetics And Inheritance

Question 1

What does the cell surface membrane do?

Answer 1

Controls what enters and leaves the cell

Question 2

What does the nucleus contain?

Answer 2

DNA (chromosomes)

Question 3

What is a chromosome?

Answer 3

A strand / piece of DNA

Question 4

What is the cytoplasm?

Answer 4

Where chemical reactions take place

Question 5

What is the mitochondria?

Answer 5

The site of respiration

Question 6

What is variation?

Answer 6

The difference between individuals of the same species

Question 7

What are the types of variation?

Answer 7

Genetic (inherited) and environmental variation

Question 8

What is DNA an abreviation of?

Answer 8

Deoxyribonucleaic Acid

Question 9

How many chromosomes do human body cells have?

Answer 9

46 (23 pairs)

Question 10

How many chromosomes do human sex cells have?

Answer 10

23

Question 11

How many chromosomes do human sex cells have?

Answer 11

23

Question 12

What is a gene?

Answer 12

Coding regions of each chromosome which determine different characteristics

Question 13

What is an allele

Answer 13

Different forms of a gene that are possible

Question 14

What are homozygous alleles?

Answer 14

Alleles that are the same

Question 15

What are heterozygous alleles?

Answer 15

Alleles that are different

Question 16

What is a genotype?

Answer 16

The alleles of an individual

Question 17

What is a phenotype?

Answer 17

The physical appearance of a person

Question 18

Name 5 dominant characteristics?

Answer 18

Dark hair, wavy hair, brown eyes, free earlobes, freckles

Question 19

What is the shape of DNA

Answer 19

double helix