Hereditary determination of sex

A detailed Summary of Hereditary determination of sex

Primary sex determination- Concerns the determination of the gonads. In

mammals, determination strictly chromosomal; not influenced by the

environment. Most cases- female = XX; male= XY

Every individual organism has atleast one X Chromosome. Since the female has

2 X chromosomes, each of her eggs posses one X chromosome. The male posses an

X and a Y, so therefore the male can produce 2 kinds of sperm, one with an X

chromosome and one with a Y chromosome. If an offspring receives an X and a Y, then it

TheY chromosome carries a gene that encodes a testis determining factor. If a

person had an innumerable number of x chromosomes and one y chromosome, they

would be male. If a person is born with only a single x chromosome and no

second x or y, then they develop as a female, but are infertile.(not able to

More Primary Sex Determination- In the is absence of the Y chromosome , the primordial

gonad body develops into ovaries. the ovary then produces the estrogenic hormones,

which contains estrogen and other such hormones, enabling the development of the

Mullerian duct into the uterus, fallopian tubes, and upper end of the v

gonads. Secondary sex determination concerns the development of the female and male

chromosomes, or a pair of XY chromosomes. They were all infertile, but developed a

The development of gonads is the only fetal organ development process that has

The first are synchronous hermaphrodites. These have ovaries and testes at the

characteristics. In humans, the primordial gonad first develops in the 4th week and remains

Secondary sex determination- concerns the bodily phenotype outside the

Approximate Word count = 968
Approximate Pages = 4 (250 words per page double spaced)

Category: Science

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