In humans, male gametes are referred to as sperm, while female gametes are called ova or egg cells. 46 chromosomes are organized into 23 pairs of chromosomes. Gametes, also known as sex cells, are the reproductive cells produced by male and female organisms for sexual reproduction The defining characteristic of a gamete is that it is haploid, meaning it contains only a single set of chromosomes. Sexual reproduction involves two parents As you can see from figure 5.12.2, in sexual reproduction, parents produce reproductive (sex) cells — called gametes — that unite to form an offspring
Gametes are haploid (or 1n) cells This means they contain one copy of each chromosome in the nucleus. At puberty cells in the gonads (testis or ovaries) undergo meiosis 23 pairs of homologous chromosomes become 23 chromosomes The germ cell from the male (sperm) will then fuse with the germ cell of the female (ovum) during reproduction to reform a cell with 23 pairs of homologous chromosomes. To understand the differences between male and female reproductive systems, we must start at the beginning
One pair of these chromosomes—xx for females or xy for males—determines sex. At fertilization, the chromosomes in one male gamete (sperm) combine with the chromosomes in one female gamete (oocyte) The male reproductive system’s function is to produce sperm and transfer them to the female reproductive tract. During fertilization, male and female gametes fuse, producing a diploid (i.e., containing paired chromosomes) zygote Sperm a sperm cell attempting to penetrate an egg (ovum) to fertilize it. In both males and females, inhibin is produced by the gonads (sertoli cells in males and granulosa cells in females) and acts to inhibit the release of fsh from the anterior pituitary, providing a feedback mechanism to regulate the production of gametes.
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