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Sex chromosome


Sex Chromosomes
The nuclei of human cells contain 22 autosomes and 2 sex chromosomes. In females, the sex chromosomes are the 2 X chromosomes. Males have one X chromosome and one Y chromosome.
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One of the two chromosomes that specify an organism's genetic sex. Humans have two kinds of sex chromosomes, one called X and the other Y. Normal females possess two X chromosomes and normal males one X and one Y.
explained: ...
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Sex chromosome
The X and Y chromosomes in organisms that determine the sex of an individual. In human beings females have two X chromosomes in diploid cells; males have an X and a Y chromosome.
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Sex Chromosomes
Humans have 23 pairs of chromosomes (46 total) chromosomes. Two of these are called sex chromosomes, the other 44 are called autosomes.
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sex chromosomes: one pair among the 23 pairs of human chromosomes; the X and Y chromosomes.
skeletal muscle: see striated muscle.
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sex chromosomes The chromosomes that determine the sex of an organism. In humans, females have two X chromosomes, and males have one X chromosome and one Y chromosome. Chromosome that determines the gender (sex) of the individual.
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sex chromosomes
The pair of chromosomes responsible for determining the sex of an individual.
sex-linked genes ...
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Sex chromosomes: The X and Y chromosomes in human beings that determine the sex of an individual. Females have two X chromosomes; males have one X an d one Y. Single strand: One half of a DNA double helix.
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Sex chromosomes are a relatively recent invention. Our ancestors in the tree of evolution did not have two sex chromosomes that are fully differentiated the way we know them with an X and a Y chromosomes.
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sex chromosome one of a pair of chromosomes whose composition determines gender
sex hormone A hormone that controls the timing of reproduction and sexual characteristics in vertebrates.
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Sex chromosome The X or Y chromosome in human beings that determines the sex of an individual. Females have two X chromosomes in diploid cells; males have an X and a Y chromosome. The sex chromosomes comprise the 23rd chromosome pair in a karyotype.
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The sex chromosomes are one of the 23 pairs of human chromosomes. The X chromosome spans more than 153 million base pairs (the building material of DNA) and represents about 5 percent of the total DNA in cells.
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Other human sex chromosome aneuploids:
XYY syndrome
Klinefelter syndrome
Triple X syndrome ...
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Genome -- all of the genes carried by a single gamete; the DNA content of an individual, which includes all 44 autosomes, 2 sex chromosomes, and the mitochondrial DNA. Genotype -- genetic constitution of an organism.
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The morphologists' results led geneticists to believe that in the male fruit fly all sex-linked characters are on a single transferrable unit, the observable sex chromosome.
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The sex with homomorphic (similarly shaped) sex chromosomes (for example, XX), producing only one kind of gamete in regard to the sex chromosomes.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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a chromosome other than a sex chromosome
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
What Topic Is Your BIOLOGY Paper On?
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: The sex, which has the two different sex chromosomes (
XY
). Human and Drosophila males are the heterogametic sex, whereas, in birds, moths, some fish and amphibians, females are the heterogametic sex (
ZW
).
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