What is intrachromosomal recombination?
Intrachromosomal recombination occurs through crossovers between loci on the same chromosomes (as described below). Recombination is important because it contributes to the genetic variation that may be observed between individuals within a population and acted upon by selection to produce evolution.
Does mitotic recombination occur in a gamete?
Mitosis occurs in somatic cells; this means that it takes place in all types of cells that are not involved in the production of gametes. Prior to each mitotic division, a copy of every chromosome is created; thus, following division, a complete set of chromosomes is found in the nucleus of each new cell.
What is meant by the term recombination frequency?
A number that describes the proportion of recombinant offspring produced in a genetic cross between two organisms.
What is Intrachromosomal translocation?
Intrachromosomal translocations involve the movement of a chromosomal segment from one location in the chromosome to another. This is normally non-reciprocal, that is another segment does not exchange places with the first segment.
What does Interchromosomal mean?
: occurring between or involving two or more chromosomes interchromosomal genetic recombination.
What does genetic recombination do?
Recombination is a process by which pieces of DNA are broken and recombined to produce new combinations of alleles. This recombination process creates genetic diversity at the level of genes that reflects differences in the DNA sequences of different organisms.
Where does mitotic recombination occur?
Mitotic recombination takes place during interphase. It has been suggested that recombination takes place during G1, when the DNA is in its 2-strand phase, and replicated during DNA synthesis.
Where does recombination occur?
Recombination occurs when two molecules of DNA exchange pieces of their genetic material with each other. One of the most notable examples of recombination takes place during meiosis (specifically, during prophase I), when homologous chromosomes line up in pairs and swap segments of DNA.
What does the term recombination mean?
What is recombination frequency quizlet?
– Recombination frequency reflects distance between two genes. – One map unit distance on a chromosome is equal to 1% recombination. Explain why value of recombination frequency between any two genes is limited to 50% – If two genes are far apart, crossover and non-crossover events will occur at equal frequency (50%)
What causes reciprocal translocation?
Reciprocal translocations occur due to the exchange of chromosome material between two nonhomologous chromosomes. When the amount of genetic material is balanced, there is no phenotypic effect on the individual because of a balanced complement of genes.
What causes chromosomal translocation?
Translocations generally result from swapping of chromosomal arms between heterologous chromosomes and hence are reciprocal in nature (Figure 1) (8,9). DNA double-strand breaks (DSBs) are prerequisites for such translocations, although little is known about their generation.