<span>During the development of
a gamete, the two alleles of the P generation separate. Each gamete carries one allele from each
parent which randomly pairs in the F1 generation. This mechanism repeats when
F1 plants cross and yield F2 plants. The
outcome of the F2 generation would then have new combinations of alleles which
can be different compared to the preceding generations.</span>
Transposable elements and short tandem repeats are different because short tandem repeats make up only a small percentage of a given genome while transposable elements often make up larger parts of a genome. So the correct option is C.
<h3>
What are transposable elements? </h3>
Transposable elements or transposons are a class of genetic elements. They can “jump” from one location to another, in a genome.
Even though they are called “jumping genes,” they have an integrated site in a genome and are maintained there. Also, most of them are eventually inactivated and can not move any longer.
Whereas Short tandem repeats or STRs are short repeats of DNA. They are also known as microsatellites or simple sequence repeats. They have a repetitive unit of 1-6 bp and form a series of 100 nucleotide lengths.
Therefore the correct option C.
Read more about transposons, here
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Answer:
True
Explanation:
Chiasma is the site of crossing over. It is an X-shaped site that appears in a tetrad (bivalent) chromosome during the diplotene stage of prophase I of meiosis I. Crossing over refers to the exchange of segments of chromatids and occurs between homologous chromosomes only. Crossing over is the event of prophase I of meiosis I and produce new gene combinations.
The homologous chromosomes are separated from each other but remain attached at chiasmata. The dissolution of chiasmata occurs by the end of prophase I and separates the homologous chromosomes completely from each other. Crossing over does not occur in mitosis. Since mitosis does not include crossing over, chiasmata are also not formed in mitosis.
