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25 Cards in this Set

  • Front
  • Back

Characteristics

Features of an organism

DNA

Large molecules that contains genes

Gamete

Scientific word for sex cell (egg and sperm)

Gene

A length of DNA that controls one inherited characteristic of an organism.

Genetic information

The instructions that control your characteristics. These instructions are found in your genes.

Inherited

Passed on to an organism from its parents.



Variation

The differences between things or organisms

Environmental factors

Things in the environment that can change something about an organism.

Resistant

Something that is not affected by disease is said to be resistant.

Species

A group of organisms that can reproduce with each other to create an organism that can also reproduce.

Variety

A set of organisms that are is some way different from other members of the same species.

Breed

A set of animals that are in some way different from other members of the same species.



Breeding

To mate two organisms of the same species to produce offspring.

Cross-Breeding

When different varieties or breeds are mated with one another.

Selective breeding

When humans choose certain animals and plants that have useful characteristics and breed more of these organisms.

Yield

How much of something useful to humans that an organism produces.

Fertilisation

Fusing of a male sex cell and a female sex cell.

Ovary

Part of the female reproductive organ in an organism, it contains ovules, each of which contains an egg cell.

Ovule

Contains egg cells. Is found in the ovary.

Pollen

The male sex cell in plants

Pollen tube

Tube that grows from a pollen grain down through the stigma and style and into the ovary.

Pollination

Transfer of pollen from an anther to a stigma.

Seed

Grows into new plant. Made by conifers and flowering plants.

Stigma

Part of the female reproductive organs in a plant. In is where the pollen lands.

During fertilisation

Two sex cells fuse.