Genetics Key Words Glossary

HideShow resource information

Homologous: homologous chromosomes are a pair of equivalent chromosomes with the same structure and arrangement of genes. Usually one is inherited from the mother and one from the father.

Bivalent: a pair of homologous chromosomes.

Locus: the postition of a particular gene ona chromosome.

Alleles: an alternative form of a gene eg in plants, one allele is for tall and one is for short.

Gene: a section of DNA on a chromosome which controls a characteristic of an organism. It carries the genetic code to produce one or more polypeptide or protein, or to make RNA.

Chromosomes: the strands of genetic material contained in the nucleus of a cell. Each one consist of a molecule of DNA wrapped around histone proteins.

Chromatid: one of the two identical strands of genetic material that make up a chromosome during cell division.

Dominant: the condition in which the effect of only one allele is seen in the phenotype, even in the presence of an…

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA, genetics and evolution resources »