Crossing-over

Crossing-over

The exchange of genetic material (DNA) between homologous chromosomes at the beginning of meiosis. This results in sperm and ova with greater genetic diversity due to a recombination of genes. Specifically, a portion of the end of a chromosome is broken and reattached on another chromosome.

This is auto-generated content. You can help to improve it.

0 0

Improve it

Add an image

Part of Speech: noun
Synonym(s):
Blossary:
Industry/Domain: Anthropology
Category: Physical anthropology
Company: Palomar College
Product:
Acronym-Abbreviation:

Collect to Blossary

Other Languages:

Related terms

crossing over

Natural environment; Coral reefs

In genetics, the breaking during meiosis of one maternal and one paternal chromosome, the exchange of corresponding sections of DNA, and the rejoining of the chromosomes. This ...

crossing over

Archaeology; Evolution

The process during meiosis in which the chromosome of a diploid pair exchange genetic material, visible in the light microscope. At a genetic level, it produces recombination.

crossing-over

Biology; Cell biology

During the first meioticprophase, the process in which part of a chromatid is physically exchanged with another chromatid to form chromosomes with new allele combinations.

crossing over

Biotechnology; Genetic engineering

A process in which homologous chromosomes exchange material through the breakage and reunion of two chromatids. A single crossover represents one reciprocal breakage and reunion ...

crossing-over

Anthropology; Physical anthropology

The exchange of genetic material (DNA) between homologous chromosomes at the beginning of meiosis. This results in sperm and ova with greater genetic diversity due to a ...

malnourishment

Anthropology; Physical anthropology

An inadequacy or an excess of some key element(s) in the diet, such as proteins, fats, or specific minerals and vitamins. See undernourishment and overnourishment.

cataract

Anthropology; Physical anthropology

An impairment of vision caused by the lenses of the eyes becoming cloudy. Cataracts are common in elderly people. They may be inherited or caused by diabetes and environmental ...

oöcyte

Anthropology; Physical anthropology

An immature female sex cell. These egg precursor cells, or primary oöcytes, are produced before birth. They become secondary oöcytes usually one by one after puberty when hormones ...

chronic disease

Anthropology; Physical anthropology

An illness that lasts for a long period of time or indefinitely. In contrast, an acute disease is one with a rapid onset and a short but usually severe course.

microcephaly

Anthropology; Physical anthropology

An extremely rare genetically inherited condition in which babies are born with extremely small brains and heads. This fatal condition has been found only among the children of 23 ...

oxidizable carbon ratio (OCR) dating

Anthropology; Physical anthropology

An experimental dating technique based on the fact that organic carbon in soil humus and charcoal progressively convert to oxidizable carbon over time. The ratios of these two ...