Sex linked traits worksheet answers

Link to Genetics Student Learning Guide. Start by viewing these slides. These chromosomes are also known as the X and Y chromosomes, and the way they determine sex is as follows:. As a result, as you can see in the partial chromosome map on the right, the genes on the X chromosome have no corresponding gene on the Y chromosome.
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sex linked traits notes

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Solving Genetics Problems involving sex-linked alleles (interactive tutorial) – sciencemusicvideos

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Sex-linked traits

In humans, as well as in many other animals and some plants, the sex of the individual is determined by sex chromosomes. The sex chromosomes are one pair of non-homologous chromosomes. In addition to 22 homologous pairs of autosomes, human females have a homologous pair of X chromosomes, whereas human males have an XY chromosome pair. Although the Y chromosome contains a small region of similarity to the X chromosome so that they can pair during meiosis, the Y chromosome is much shorter and contains many fewer genes. When a gene being examined is present on the X chromosome, but not on the Y chromosome, it is said to be X-linked.
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A gene present on one of the sex chromosomes X or Y in mammals is a sex-linked trait because its expression depends on the sex of the individual. In humans, as well as in many other animals and some plants, the sex of the individual is determined by sex chromosomes. However, there are other sex determination systems in nature. For example, temperature-dependent sex determination is relatively common, and there are many other types of environmental sex determination.
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