Learn about the xx and xy chromosomes, the sex determination system, and other chromosome combinations. The xx/xy system is found in most other mammals, as well as some insects In this system, females have two of the same kind of sex chromosome (xx), while males have two distinct sex chromosomes (xy). The thing is, xx and xy chromosomes aren’t cut and dry, either Actually, sex chromosomes and genetic expression vary widely, beyond a penis/vagina or xy/xx binary Xx and xy with the aforementioned expressions are the most common sex chromosomes and corresponding organs, but they’re not the only ones.
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. 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). The x chromosome is larger than y because it carries more instructions
A karyotype is a complete set of chromosomes from an organism or species This is a human male karyotype In the red box, you see the sex.
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