B6

Question 1

Define Allele

Answer 1

Alternative forms of a gene

Question 2

Define gene

Answer 2

A section of DNA that determines an inherited characteristic.

Question 3

Define genome

Answer 3

The complete genetic material of an organism.

Question 4

Define gamete

Answer 4

Sex cell

Question 5

Define chromosome

Answer 5

Thread like structures containing lightly coiled DNA

Question 6

Define Dominant

Answer 6

A characteristic that is observed even if one allele is present

Question 7

Define recessive

Answer 7

A characteristic that is only observed if no dominant alleles are present

Question 8

Define Homozygous

Answer 8

The presence of the same two alleles

Question 9

Define heterozygous

Answer 9

The presence of two different alleles

Question 10

Genotype

Answer 10

Genetic makeup of an organism

Question 11

Phenotype

Answer 11

The physical characteristics or an organisms genotype

Question 12

What part of the cell does cystic fibrosis effect

Answer 12

Cell membrane

Question 13

What happens in the cells before mitosis occurs

Answer 13

Each chromosome replicates

Question 14

How many cells does mitosis produce?

Answer 14

2 daughter cells

Question 15

How many divisions take place in mitosis?

Answer 15

1

Question 16

How many divisions take place in meiosis

Answer 16

2

Question 17

How much genetic material do these cells contain (mitosis)

Answer 17

46 chromosomes

Question 18

How many cells does meiosis produce?

Answer 18

4 daughter cells

Question 19

Define haploid

Answer 19

Gametes containing 23 chromosomes (half)

Question 20

Define diploid

Answer 20

Body cells containing a full set of chromosomes (46)

Question 21

Why is there little evidence of early life on esrtb

Answer 21

Many early life forms were soft bodied meaning there are not many traces left behind

Question 22

Define extinction

Answer 22

When there is no more individuals left of a species left

Question 23

What is mutation

Answer 23

The changing of the structure of DNA

Question 24

What is biodiversity

Answer 24

The variety of different specifies in an ecosystem

Question 25

What is GM crops

Answer 25

Crops that are genetically modified by scientists to have desired characteristic

Question 26

Define the shape of Dna

Answer 26

Double helix shape. A twisted laddrr

Question 27

Which bases connect together

Answer 27

T,A. C,G

Question 28

4 main ways that extinction can be caused

Answer 28

New disease. New predator. Lack of food. Natural disaster

Question 29

Is sickle cell recessive or dominant

Answer 29

Recessive

Question 30

Is cystic fibrosis recessive or dominant

Answer 30

Recessive

Question 31

What is a genetic disorder

Answer 31

A disease which is passed on from parent to child

Question 32

Symptoms of sick cell

Answer 32

Tiredness shortness of breathe player skin and fainting

Question 33

Symptoms of cystic fibrosis

Answer 33

Tiredness coughing build up of musics in lungs

Question 34

What happens in the cells before meiosis occurs

Answer 34

Each chromosome is replicated

Question 35

How much genetic information does each meiosis cell contian

Answer 35

23 chromosomes

Question 36

Why do meiosis cells contain 23 chromosomes

Answer 36

Because gametes contain this amount of chromosomes where is where meiosis occurs

Question 37

What is genetic engineering

Answer 37

A process that uses laboratory based technology to alter the DNA makeup of an organism

Question 38

The stages of natural selection

Answer 38

Variation ,inheritance , selection , time and adaption

Question 39

Adavantages of gm crops

Answer 39

Tastier food Less use of pesticides Faster growing

Question 40

Disadvantages if gm crops

Answer 40

Less nutritious Toxicity Cancer

Question 41

How can fossils be evidence for evolution

Answer 41

Shows how creatures evolved over time and showing that all species are related to eachother