Sentences with phrase «developing gonads»
Instead of developing gonads and reproducing, a few polyps, calyx and all, disengage from surrounding ones and raise themselves above the coral surface on a mineral stalk.
http://www.sciencemag.org/ Not exact matches
«The gonads of the developing fetus are the epicenters of sex determination,» notes Margaret McCarthy, a neuroscientist at the University of Maryland School of Medicine.
Most females with a Y chromosome have underdeveloped gonads that are prone to developing tumours and usually removed.
«How can you tell if their gonads are deformed if the animals don't develop properly?»
At and above 0.1 ppb, they found that 16 % to 20 % of the animals developed up to six gonads, including both testes and ovaries.
Puberty begins when a part of the brain called the hypothalamus begins pumping out gonadotropin - releasing hormone (GNRH) which in turn prompts the gonads to develop and the body to change.
First, breeding animals that have or could develop human germ cells in their gonads should not be allowed.
Even though chromosomes mark the cells as male or female, they don't head down that path until after the gonads — testes in a male, ovaries in a female — begin developing and secreting hormones at about 7 weeks.
When the team forced regions such as the developing nervous system to express the enzyme, the germ cells journeyed there rather than to the gonads.
(Some develop «streak gonads.»
In a developing embryo PGC's can be isolated from the germinal crescent, a region in the early stage embryo where the cells form, or from the gonads at a later stage in embryonic development.
Many times in bird research injected cells will incorporate into the gonads (testes or ovaries) but will not integrate and develop into adult germ cells.
In a developing embryo PGC's can be isolated from the germinal crescent, a region in the early stage embryo where the cells form, or from the gonads at a later stage in embryonic development.