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Segregation

Biology SegregatingSelection

segregation
Mendel's first law; The separation of the members of a homologous pair of chromosomes into different gametes through the process of meiosis
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...

 


segregation of non-homologous centromeres during meiosis in a reciprocal translocation heterozygote such that unbalanced gametes with duplications and deficiencies are produced. See alternate segregation and adjacent-2 segregation.

segregation Separation of replicated chromosomes to opposite sides of the cell. Distribution of alleles on chromosomes into gametes during meiosis.

Segregation The separation of the alleles of a pair from each other at meiosis.

segregation
the separation of homologous chromosomes during anaphase 1 of meiosis, producing gametes containing only one allele of each gene.

Segregation The normal biological process whereby the two pieces of a chromosome pair are separated during meiosis and randomly distributed to the germ cells.
Sequence See: base sequence ...

law of segregation
Mendel's first law, stating that allele pairs separate during gamete formation, and then randomly re-form pairs during the fusion of gametes at fertilization.
leaching ...

Segregation
The separation of allelic differences from one another. Segregation may occur at the first or second division of meiosis, or at the first mitosis after meiosis (postmeiotic segregation). Leading to new gene combinations (=recombination).

Segregation distortion
Deviation from the expected Mendelian proportion of individuals in a given genotypic class within a segregating population.

2.1 Law of Segregation
2.2 Law of Independent Assortment
[edit] History
Main article: History of genetics ...

principle of segregation One of Mendel's observations on the behavior of hereditary units during gamete formation.

Because of the segregation of the X and Y chromosomes during male meiosis.
B.
Because of the segregation of the X chromosomes during female meiosis.

Post-meiotic segregation
The type of segregation produced when a recombinant DNA molecule contains an uncorrected mismatched base pair; at the next replication, normal base pairing occurs producing one mutant progeny and one wild-type progeny.

principle of segregation Mendel's ?rst law; holds that each pair of factors of heredity separate during gamete formation so that each gamete receives one member of a pair.

Mendel's law of segregation essentially has three parts.
Alternative versions of genes account for variations in inherited characters. This is the concept of alleles. Alleles are different versions of genes that impart the same characteristic.

This statement is often called Mendel's rule of segregation.
If an organism has two unlike factors (we call them alleles) for a characteristic, one may be expressed to the total exclusion of the other (dominant vs recessive).

In order to ensure the inheritance of a complete ensemble of critical internal components by each daughter cell, the cell division process must provide for the segregation of organelles, such as mitochondria, the Golgi apparatus, ...

Principle of Segregation
Mendel's principle of segregation states that paired factors (genes) separate during gamete formation (meiosis).

Chromosomes are structurally quite sophisticated, containing elements necessary for processes such as replication and segregation. Each species has a characteristic set of chromosomes with respect to number and organization.

Genetics Basics
Mendel's Law of Segregation
Law of Independent Assortment
Chromosomes and Gender ...

Previous pages have described how genetic information is passed along from parents to offspring. Mendel summarised this in his first law, the principle of segregation
Mendel's First Law ...

The second thing you have to do is coordinate the activities of very large numbers of proteins. DNA replication involves thousands proteins probably. And chromosome segregation probably involves a thousand proteins.

Rabs 5, 21 and 22 have all been localized to the early endocytic pathway and have been shown to share a number of characteristics to merit their segregation into a single functional endocytic group.

In other words cold water makes baby female fish form, it doesn't kill male baby fish. The same embryo could be male or female depending on the temperature it is raised at (i.e. Mendelian segregation does not influence the sex ratio in this species.

See also: Chromosome, Organ, Cell, DNA, Chromosomes