Edexcel GCSE Combined Science CB3 Genetics overview quiz quiz

A whole molecule of DNA found inside the nucleus of a cell

A particular version of an inherited characteristic

A small section of DNA that codes for a protein

A matching pair of chromosomes in the nucleus

One

Two

Eight

Four

It involves one parent and produces genetically identical clones

It involves two parents and produces lots of genetic variation in the offspring

It uses meiosis to make gametes that have half the chromosome number

It always produces exactly four genetically different offspring each time

Is only ever shown when two identical copies are present

Is shown even when only one copy is present

Is always harmful to the organism that carries it

Cannot be passed on to any of the offspring

1 to 1

2 to 1

3 to 1

1 to 2

1 in 2

1 in 3

Zero

1 in 4

So that fertilisation restores the full number when two gametes join

To make each of the new cells very much smaller than the parent cell

To create cells that are all genetically identical to the parent cell

To speed up the growth and repair of the body's tissues

Natural eye colour

A scar from an injury

Blood group

Inherited cystic fibrosis

A change in the environment that an organism lives in

The joining together of a male and a female gamete

A random change in the DNA base sequence

The copying of the DNA that happens just before mitosis

Homozygous dominant

Haploid

Recessive

Heterozygous

All of its genetic material

A single gene from one chromosome

Just one matching pair of chromosomes

All of the proteins that its cells make

3 to 1

1 to 1

All dominant

All recessive