Genetics 9A

Question 1

What is a species

Answer 1

A group of similar organisms who can produce offspring that can also reproduce

Question 2

What are characteristics

Answer 2

Describes how you look

Question 3

What is variation

Answer 3

Differences in characteristics

Question 4

What is inherited characteristics

Answer 4

When children get parents characteristics

Question 5

What does nuclei contain

Answer 5

Chromosomes which contain genes which contain genetic information which carries the instructions for your characteristics and how they vary

Question 6

The nuclei of gametes only contain

Answer 6

Half the chromosomes of normal cells

Question 7

What are mutations

Answer 7

Changes in genes

Question 8

How many chromosomes are there in one human cell

Answer 8

46 but 23 in gametes

Question 9

A female nucleus contain

Answer 9

Two large X chromosomes

Question 10

A male nucleus contains

Answer 10

1 large x and 1 small y

Question 11

What are alleles

Answer 11

Different versions of the same gene

Question 12

One allele is more dominant

Answer 12

Than a recessive one

Question 13

For a recessive gene to work

Answer 13

For a recessive gene to work both chromosomes must be recessive

Question 14

Plants that are the same species but show clear differences are

Answer 14

From a different variety

Question 15

Breeds are

Answer 15

Varieties within breeds

Question 16

Environmental variation is caused by

Answer 16

Environmental variation is caused by environmental factors

Question 17

Selective breeding def

Answer 17

When animals with certain characteristics are selected for breeding

Question 18

Cross breeding def

Answer 18

Different breeed are selected to mate with each other

Question 19

Genetic modification

Answer 19

When genes are put or replaced in animals

Question 20

Male gametes of flower

Answer 20

Pollen grain

Question 21

Pollination

Answer 21

Transfer of pollen to a stigma

Question 22

Cloning is

Answer 22

Asexual reproduction and does not need gametes

Question 23

Order of largest to smallest 
Chromosome 
DNA 
Nuclei 
Genes
Cell

Answer 23

Cell nuclei chromosome dna genes

Question 24

What is a gene

Answer 24

A length of dna that codes for a specific protein

Question 25

Characteristic are

Answer 25

Heredity plus environmental factors

Question 26

What is genetics

Answer 26

The study of heredity

Question 27

Emma has short thumbs which is controlled by genes

Answer 27

Yes because heredity characteristics are the are the only ones passed through genes

Question 28

Describe the structure of DNA

Answer 28

It has a double helix structure - a coil containing two chains