Sentences with phrase «female gamete»

Sexual reproduction in flowering plants occurs by fertilization of the female gamete (a reproductive cell) by a male gamete.

For example, a few mutations in a critical binding pocket within the gamete receptors (the proteins that allow a male gamete to adhere to a female gamete) of various invertebrate marine organisms (these organisms simply discharge their gametes into the water in a blind shotgun mating strategy) can produce a reproductive isolation event between subpopulations.

But slow freezing can damage the female gamete as ice crystals form and squeeze the genetic material.

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.

Double fertilization of the female gametes triggers an unusual cell fusion, followed by specific cell disorganization that inactivates the cell responsible for attracting pollen tubes.

«Through examination of Arabidopsis ovules by highly sensitive live - imaging, we were able to see that successful fertilization of the two female gametes triggers an unprecedented cell fusion between the persistent synergid cell and the endosperm (SE fusion), which eventually leads to inactivation of the persistent synergid cell.»

Furthermore, the requirement of mouse Boule for male reproduction and its dispensability for female fertility suggests that low level expression of Boule in embryonic germ cells and adult ovaries is not essential for either the development of germ cells or the production of female gametes.

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».

To reproduce, C. elegans must produce gametes, that is male sperm and female eggs.

By transmitting the genetic information to the next generation and marking the beginning of a new life, the encounter between female and male gametes at fertilisation is one of the most fundamental processes in biology.

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.

Why would a situation evolve where some individuals produce small gametes that are motile or capable of motion (the males) and others produce large, non-motile gametes (the females)?»

He derived a prediction from an existing mathematical model of the Disruptive Selection Theory that states that for the evolution of males and females to remain stable, the ratio of the size of the larger gamete to the smaller gamete has to be greater than three.

How oocytes, the maternal gametes, lose centrioles and the importance of doing so for female fertility has been an enigma since the 1930s.

Both male and female F1 offspring exhibited insulin resistance and higher glucose, inherited predominantly through maternal gametes (147).

In F1 generation, female offspring of HFD parents showed higher adiposity, with nearly similar effects of maternal and paternal gametes.

gamete: Haploid reproductive cells that combine at fertilization to form the zygote, called sperm (or pollen) in males and eggs in females.

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.

My favorite is sperm competition theory, which basically states human mate competition is not performed at the organism level (human males fighting with other human males for a human female) but actually at the gamete level (sperm fighting with other sperm for an egg).