It has the same number of chromosomes as an adult, that is 23 pairs.
These genotypes are determined by a human's 23rd pair of chromosomes. If the subject is female, she has two X's reading XX. If it is male, then his genotype will read XY. There is a 50-50 shot of each. This is because a woman donates one chromosome (she only has two X's so it is inevitable that she will donate an X), and a man donates one of his. If a man donates his 'X' then there will be two X's and the child will be female. If he donates his 'Y' then the child will be male. Male is XY, female is XX. There are, however, other genotypes (XXY, XXX, XO...) and not all people have a phenotype that goes with their genotype.
XX
ZZ
ZZ
the genotype for a male is XY thank you, Allyson
Maleness is not a genotype but a combination of sex chromosomes. A normal human male has an X as well as a Y chromosome.
These genotypes are determined by a human's 23rd pair of chromosomes. If the subject is female, she has two X's reading XX. If it is male, then his genotype will read XY. There is a 50-50 shot of each. This is because a woman donates one chromosome (she only has two X's so it is inevitable that she will donate an X), and a man donates one of his. If a man donates his 'X' then there will be two X's and the child will be female. If he donates his 'Y' then the child will be male. Male is XY, female is XX. There are, however, other genotypes (XXY, XXX, XO...) and not all people have a phenotype that goes with their genotype.
The genotype for a male is XY. A female is XX. The 23rd homologous pair is the sex gene that determines this.
normal
xy
XY
XY
XX
The genotype for a person suffering with Klinefelter's syndrome is XXY.
XX
If you are referring to chromosomes, it is XY.
ZZ