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In the XY sex-determination system, the female-provided ovum contributes an X chromosome and the male-provided sperm contributes either an X chromosome or a Y chromosome, resulting in female (XX) or male (XY) offspring, respectively.
13 mar 2018 · The main differences between males and females are the X and Y chromosomes. Among humans, two X chromosomes make a woman, and an X and a Y chromosome make a man. However, there are other differentiating features between these chromosomes.
4 dni temu · Sex chromosome, either of a pair of chromosomes that determine whether an individual is male or female. The sex chromosomes of human beings and other mammals are designated by scientists as X and Y. In humans the sex chromosomes consist of one pair of the total of 23 pairs of chromosomes.
In most mammals, females are XX, and can pass along either of their Xs; since males are XY they can pass along either an X or a Y. Females in such species receive an X chromosome from each parent while males receive an X chromosome from their mother and a Y chromosome from their father.
These differences are caused by the effects of the different sex chromosome complement in males and females, and differential exposure to gonadal sex hormones during development. Sexual dimorphism is a term for the phenotypic difference between males and females of the same species.
In humans, females inherit an X chromosome from each parent, whereas males always inherit their X chromosome from their mother and their Y chromosome from their father.
Females Have Two X Chromosomes, Males Have One. Male and female genomes also differ in the other sex chromosome, the X chromosome, in that females have twice the dose of X-chromosomelinked genes that males have.
