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4 dni temu · Individuals having two X chromosomes (XX) are female; individuals having one X chromosome and one Y chromosome (XY) are male. The X chromosome resembles a large autosomal chromosome with a long and a short arm. The Y chromosome has one long arm and a very short second arm.
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The process of meiosis and fertilization (with rare exceptions) results in a zygote with either two X chromosomes (an XX female) or one X and one Y chromosome (an XY male) which then develops the typical female or male phenotype.
These include 22 pairs of “autosomes” (which refers to all chromosomes that are not sex chromosomes) and a pair of sex chromosomes, either an X and a Y (which makes for a male) or two Xs (female). That means the genetic signature for a person with 46 chromosomes is either 46,XY (males), or 46,XX (females).
In humans and other mammals, biological sex is determined by sex chromosomes. XX is for females, and XY is for males.
26 paź 2020 · Here’s what’s regarded as the “norm”: XY chromosomes = penis & testes = man. XX chromosomes = vagina & ovaries = woman. Gender is subjective to each person, and sex organs don’t dictate gender. People with penises aren’t necessarily men, and people with vaginas aren’t necessarily women.
People usually have two sex chromosomes. Typically, embryos with one X and one Y chromosome develop into males. And those with two X chromosomes usually become females. We get one sex chromosome from our fathers, carried by sperm, and one from our mothers, carried by the egg.
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.
