Biology - B1 Key Words

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  • Created by: Niamh
  • Created on: 14-05-11 20:45

B1 Key Words

Inherited - A feature that is passed from parents to their offspring through genes.

Environment - Everything that surrounds you. This is factors like the air, the Earth, and the water as well as other living things.

Nucleus - The part of the cell that holds all of the information.

Chromosomes - Long, thin, thread-like structures in the nucleus of a cell made from a molecule of DNA. Chromosomes carry the genes.

Structural - Used to build something. For example, structural proteins which make everything in the body.

DNA - Deoxyribonucleic acid. The chemical that makes up chromosomes. DNA carries the genetic code, which controls how an organism develops.

Protein - Chemicals in living things that are polymers made by joining together amino acids.

Genes - A section of DNA giving the instructions for a cell about how to make one kind of protein.

Enzymes - A protein that catalyses (speeds up) chemical reactions in living things.

Huntingdon's Disorder - An inherited disease of the nervous system. The symptoms do not show up until middle age.

Sex Cells - Cells produced by males and females for reproduction - egg cells and sperm cells. Sex cells carry a copy of the parent's genetic information. They join together at fertilisation.

23 Pairs - Human body cells have 23 pairs of chromosomes in the nucleus.

Alleles - Different versions  of the same gene.

Dominant - Describes an allele that will  show up in an


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