Sophie.cerys
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So autosomal linkage is when both genes on the same chromosome, but does this mean the same chromosome as in 1 chromatid, or chromosome as in 2 chromatids?
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tocka90
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As two. Visit https://www.youtube.com/channel/UCQX...AnOAPVBv-QRNTQ for the video on that topic.
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Jpw1097
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(Original post by Sophie.cerys)
So autosomal linkage is when both genes on the same chromosome, but does this mean the same chromosome as in 1 chromatid, or chromosome as in 2 chromatids?
Autosomes are non-sex chromosomes, so there are 22 pairs of autosomes in humans (so 44 autosomes in total). Genetic linkage is the phenomenon where genes that are close together on a chromosome are inherited together. This is because the closer together that genes are, the less likely chiasmata (i.e. crossing-over) are to form in between the genes. For example, if two genes are right next to each other, the likelihood of the DNA crossing-over at the point in between the two genes is unlikely whereas if two genes are further apart, crossing-over can occur at lots of points between the two genes, and so the genes are likely to be separated and therefore not inherited together.
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Sophie.cerys
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Thanks!
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