Sentences with phrase «sex gametes»

So when something as complex as the ability to produce sex gametes is lost, it's likely never to be developed again.

Not exact matches

The first page of Larsen's Human Embryology states that, `... [W] e begin our description of the developing human with the formation and differentiation of the male and female sex cells or gametes [sperm and egg], which will unite at fertilisation to initiate the embryonic development of a new individual».

(Sex is not reproductive, he says, but rather a reduction of two gamete cells into one — it's mitosis, the duplication of cells, that is reproductive.

It interferes with the process of meiosis — the form of cell division that creates sex cells, called gametes, like eggs and sperm.

By that time, the sex - inducing gene was active and the volvox began making male and female gametes instead of asexual ones, the group reports online 9 June in the Proceedings of the Royal Society, London, B.

This northern coastal seaweed shuns sex when the sea is rough and can carry its gametes — the sperm and eggs — away.

When shaken in the lab, or when thrashed by turbulent currents in its natural habitat, the seaweed's two sexes hold on to their gametes, releasing them only when the water is tranquil.

It describes how a population evolves from different mating types producing same - sized sex cells (or gametes) to mating types producing different - sized gametes, such as where there are distinct males and females.

The question of why different types of sex cells evolved, such as sperm and eggs (collectively known as gametes), remains uncertain.

Interactions between the two sexes and between competing males commonly occur after the pageantry of courtship and mating subsides, and the battles reach all the way down to the level of genitalia and gametes.

Sex - specific traits that lead to the production of dimorphic gametes, sperm in males and eggs in females, are fundamental for sexual reproduction and accordingly widespread among animals.

Dr. Ted Clark, «Structure Function Studies Link Viral and Gamete Fusion Proteins: Implications for the Orign of Eurkaryotic Sex».

Choose only one in each vertical column, for each genome (in a sex cell or gamete).

While Canadian law on the use and manipulation of gametes and embryos is quite conservative, those seeking less bureaucratic or more radical interventions can simply ask the potential surrogate mother to cross the Canada-U.S. border where IVF would be performed following, for example, sex selection or pre-implantation genetic testing in a more technology - friendly American state.