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What is sex linked genes

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This change can affect a single nucleotide pair or larger gene segments of a chromosome. Altering nucleotide sequences most often results in nonfunctioning proteins. Gene mutations can be generally categorized into two types: point mutations and base-pair insertions or deletions. Point mutations are the most common type of gene mutation.
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Sex-linked recessive

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Sex-linked recessive: MedlinePlus Medical Encyclopedia

In Niche, there are 21 different types of genes, each of which affects a different part or ability of the nicheling. These types of genes are:. Each nicheling has two copies of every gene except for Blood Clotting, which is an X-linked trait, so males only have one due to possessing a single X chromosome. They inherit one copy from their mother and one from their father. When they breed , each parent will randomly pass on one copy of each gene. If a gene is dominant , then only one copy is needed for it to be expressed. If it is recessive , then two copies are needed.
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“Sex Limited Inheritance in Drosophila” (1910), by Thomas Hunt Morgan

Sex linked is a trait in which a gene is located on a sex chromosome. In humans, the term generally refers to traits that are influenced by genes on the X chromosome. This is because the X chromosome is large and contains many more genes than the smaller Y chromosome.
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This image is an example of the kind of gel pictures researchers use to understand the order, or sequence, of genes or to look for mutations in genes. Out of people with breast cancer about 15 will have triple-negative breast cancer TNBC. If doctors had a way to identify women at risk for TNBC, they might be able to find cancer earlier and before it spreads when it might be easier to treat. One approach researchers are using to identify women at risk for TNBC and possible treatment options for TNBC is by studying inherited changes mutations in cancer genes.
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