the location of a gene on a chromosome is called locus.
the location of a gene on a chromosome is called locus.
the location of a gene on a chromosome is called a(n)?
locus
in humans and other mammal species, sex is determined by two sex chromosomes called the x chromosome and the y chromosome. human females are typically xx; males are typically xy. the remaining pairs of chromosome are found in both sexes and are called autosomes; genetic traits due to loci on these chromosomes are described as autosomal, and may be dominant or recessive. genetic traits on the x and y chromosomes are called sex-linked, because they are linked to sex chromosomes, not because they are characteristic of one sex or the other. in practice, the term almost always refers to x-linked traits and a great many such traits (such as red-green colour vision deficiency) are not affected by sex. females have two copies of every gene locus found on the x chromosome, just as for the autosomes, and the same dominance relationships apply. males, however, have only one copy of each x chromosome gene locus, and are described as hemizygous for these genes. the y chromosome is much smaller than the x, and contains a much smaller set of genes, including, but not limited to, those that influence 'maleness', such as the sry gene for testis determining factor. dominance rules for sex-linked gene loci are determined by their behavior in the female: because the male has only one allele (except in the case of certain types of y chromosome aneuploidy), that allele is always expressed regardless of whether it is dominant or recessive.
dominance (genetics)
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nuclear dna