Explanation: Translocation is a chromosomal abnormality (mutation) in which a chromosome breaks and a portion of it reattaches to a different chromosomal location. … Reciprocal location, in which two fragments break off from two different (non-homologous) chromosomes and switch places.
What refers to the movement of a piece of one chromosome to another nonhomologous chromosome?
Intrachromosomal translocations involve the movement of a chromosomal segment from one location in the chromosome to another. … Reciprocal translocations occur when chromosomal segments are exchanged between two non- homologous chromosomes and is the most typical type of translocation.
What is a nonhomologous chromosome?
What it means. It is the pair of chromosomes with the same sequence of genes. Chromosomes do not constitute the same pair.
What is it called when genes move between homologous pairs of chromosomes?
Chromosomal crossover, or crossing over, is the exchange of genetic material during sexual reproduction between two homologous chromosomes‘ non-sister chromatids that results in recombinant chromosomes.
Which of the following refers to the movement of a piece of one chromosome to another?
Which refers to the movement of a piece of one chromosome to another nonhomologous chromosome? translocation.
When genetic material is missing a chromosome is said to have a?
If a cell is missing one or more chromosomes, it is said to be aneuploid (an- = not, “not good”).
What does Nonhomologous mean?
: being of unlike genetic constitution —used of chromosomes of one set containing nonallelic genes … is done by facilitating genetic recombination of the ends of the elements with other, nonhomologous sequences.—
What does NHEJ stand for?
The subsequent repair of chromosomal DSBs by the cell can be classified into two categories of repair pathways: non-homologous end joining (NHEJ) and homology-directed repair (HDR). At its core, NHEJ-break ends can be ligated without a homologous template, whereas HDR-breaks requires a template to guide repair.
Is NHEJ faster than HDR?
Mammalian cells preferentially employ NHEJ over HDR through several mechanisms: NHEJ is active throughout the cell cycle, whereas HDR is restricted to S/G2 phases; NHEJ is faster than HDR; and NHEJ suppresses the HDR process.
What does it mean when two sets of chromosomes are homologous?
These two sets of chromosomes are homologous, meaning that each of the four chromosomes from the male parent has a corresponding chromosome from the female parent. What are Diploid Cells? homologous chromosomes is diploid, meaning “two sets.” The diploid number of chromosomes is sometimes represented by the symbol 2N.
What characteristics do two homologous chromosomes share?
The two chromosomes in a homologous pair are very similar to one another and have the same size and shape. Most importantly, they carry the same type of genetic information: that is, they have the same genes in the same locations. However, they don’t necessarily have the same versions of genes.
What is the same in all parts of homologous chromosomes?
Homologous chromosomes are similiar but not identical. Each carries the same genes in the same order, but the alleles for each trait may not be the same. … The maternal and paternal chromosomes in a homologous pair have the same genes at the same loci, but possibly different alleles.