What is it called when a chromosome breaks and a fragment of it joins a homologous chromosome?

What is it called when a piece of one chromosome breaks off and attaches to another chromosome?

Translocations. A translocation occurs when a piece of one chromosome breaks off and attaches to another chromosome. This type of rearrangement is described as balanced if no genetic material is gained or lost in the cell. If there is a gain or loss of genetic material, the translocation is described as unbalanced .

What is it called when you join two homologous chromosomes?

The tight pairing of the homologous chromosomes is called synapsis. In synapsis, the genes on the chromatids of the homologous chromosomes are aligned precisely with each other.

When chromosome breaks and the two fragments join together after rotating by 180o is called?

chromosomal mutation

An inversion occurs when a chromosome breaks in two places and the region between the break rotates 180° before rejoining with the two end fragments.

IT IS INTERESTING:  Best answer: Why is telophase important to the cell cycle?

When a chromosome fragment becomes attaches to a nonhomologous chromosome it is called a?

When two nonhomologous chromosomes mutate by exchanging parts, the resulting chromosomal rearrangements are translocations.

Which of the following occurs when a piece of one chromosome breaks off and is attached to another nonhomologous chromosome?

If a chromosome break occurs in each of two nonhomologous chromosomes and the two breaks rejoin in a new arrangement, the new segment is called a translocation.

What does Nondisjunction mean?

Nondisjunction means that a pair of homologous chromosomes has failed to separate or segregate at anaphase so that both chromosomes of the pair pass to the same daughter cell. This probably occurs most commonly in meiosis, but it may occur in mitosis to produce a mosaic individual.

When the chromosomes come together as homologous pairs?

During prophase I, the pairs of homologous chromosomes come together to form a tetrad or bivalent, which contains four chromatids. Recombination can occur between any two chromatids within this tetrad structure.

When homologous chromosomes match up they form a structure called a?

During prophase I, the chromosomes condense and homologous chromosomes pair up with one another. The process by which these homologous pairs come together is known as synapsis. Synapsis forms a chromosome complex called a tetrad. In summary, synapsis brings homologous chromosomes together, forming tetrads.

What type of mutation occurs when a chromosome breaks in two places a piece of the chromosome rotates and all the chromosome pieces rejoin?

Inversions. If two breaks occur in one chromosome, sometimes the region between the breaks rotates 180 degrees before rejoining with the two end fragments. Such an event creates a chromosomal mutation called an inversion.

IT IS INTERESTING:  What type of genetic disorder is Patau syndrome?