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In humans, this is determined by a particular pair of chromosomes (pairs of sections of DNA, one from the father, one from the mother). This particular pair are called the sex chromosomes. Men have one 'X' and one 'Y' sex chromosome, while women have two 'X'. The sex of a baby is therefore determined by which of the sex chromosomes are present in the sperm that fertilises the egg (which are selected randomly in a process called meiosis).
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Some other species, such as many amphibians, use a different system whereby the male has no 'Y' sex chromosome, so a female has 'XX' and a male has 'X0', where 0 signifies the absence of a second chromosome.
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Some species, e.g. alligators, do not use DNA at all to determine the offspring's sex; in this case, the temperature at which the nest is kept is the deciding factor. Yet other species (mainly insects) are either hermaphrodites i.e. they are both male and female, or can change sex in response to external influences.
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<p>Sources : any A level/high school Biology textbook will tell you much of this, Wikipedia for the unusual methods of sex determination.</p>
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∙ 12y ago
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∙ 11y agothe sperm
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What does the x and the y choromosome determine?
it determines the gender of a human being
What determines the traits of an organism?
the traits of an organism is controled by its???
Do women like to be sexed hard or soft?
To sex something is to determine the gender of an organism. Hard and soft are not properties required to sex an organism, most particularly human females.
Where are the genes that determine gender found?
The genes that determines gender can be found in the Y chromosome.
What determines an organisms alleles in sexual reproduction?
what determines an organism's alles in sexual reproduction
What does the x and the y choromosome determine?
it determines the gender of a human being
Which pair of chromesomes determines gender?
Chromosome pair 23 determines the gender of a human. These chromosomes will either be two X's for females, or an X and a Y for males.
What determines whether a living organism will grow into a human or a flower?
The genetic information carried by the cell.
Do women like to be hard or soft?
To sex something is to determine the gender of an organism. Hard and soft are not properties required to sex an organism, most particularly human females.
What determines the traits of an organism?
the traits of an organism is controled by its???
Do women like to be sexed hard or soft?
To sex something is to determine the gender of an organism. Hard and soft are not properties required to sex an organism, most particularly human females.
What determines an organsm phenotype?
An organism's genotype determines its phenotype.
What determines and organism's niche?
its role
Where are the genes that determine gender found?
The genes that determines gender can be found in the Y chromosome.
What determines an organisms alleles in sexual reproduction?
what determines an organism's alles in sexual reproduction
What determines the kind of genes an organism has?
Its parent(s).
What are some unusual characteristics of a stingray?
They have a fin, which determines, if their gender
