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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>
What else can I help you with?
What does the x and the y choromosome determine?
it determines the gender of a human being
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.
Which chromosome determines the gender of an organism?
The sex of an organism is primarily determined by the presence of specific sex chromosomes. In humans and many other mammals, the presence of two X chromosomes (XX) typically indicates a female, while one X and one Y chromosome (XY) indicate a male. The Y chromosome carries the SRY gene, which triggers the development of male characteristics. Thus, it is the combination of these sex chromosomes that determines gender.
Where are the genes that determine gender found?
The genes that determines gender can be found in the Y chromosome.
How does DNA affect an orginsims traits?
DNA carries the genetic information that determines an organism's traits. The sequence of nucleotides in DNA determines the sequence of amino acids in proteins, which are essential for an organism's structure and function. Mutations in DNA can result in changes to an organism's traits.
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.
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.
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.
Is an allele a trait that determines a specific characteristic in an organism?
Yes, an allele is a variant form of a gene that determines a specific characteristic or trait in an organism.
How does DNA affect an orginsims traits?
DNA carries the genetic information that determines an organism's traits. The sequence of nucleotides in DNA determines the sequence of amino acids in proteins, which are essential for an organism's structure and function. Mutations in DNA can result in changes to an organism's traits.
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
The risk factor that also determines an individual's sex is?
gender
The order of nitrogenous bases in DNA determines the order of what in organism?
The order of the Amino Acids in the protein chain.
How is an organisms niche determined?
A organism's niche determines three different things. The three things that are determined are where the organism lives, where it is on the food web and the food the organism eats.
