iPedia Free Information Center

Information about Heterogamous

Heterogamy has a number of biological definitions:
  • In reproductive biology, heterogamy is the alternation of differently organized generations, applied to the alternation between parthenogenetic and a sexual generation. This type of heterogamy occurs for example in some aphids.
  • In cell biology, heterogamy is a synonym of anisogamy, the condition of having differently sized male and female gametes produced by different sexes or mating types in a species.
  • In botany, a plant is heterogamous when it carries at least two different types of flowers in regards to their reproductive structures, for example male and female flowers or bisexual and female flowers. Stamens and carpels are not regularly present in each flower or floret.
  • In a social context, heterogamy refers to a marriage between two individuals that differ in a certain criterion. For example, ethnic heterogamy refers to marriages involving individuals of different ethnic groups, and age-heterogamy refers to marriages involving partners of significantly different ages.
The terms homogametic and heterogametic are related to heterogamy, but distinct.
Parthenogenesis (from the Greek παρθένος parthenos, "virgin", + γένεσις genesis
..... Click the link for more information.
Sexual reproduction is a union that results in increasing genetic diversity of the offspring. It is characterized by two processes: meiosis, involving the halving of the number of chromosomes; and fertilisation, involving the fusion of two gametes and the restoration of the
..... Click the link for more information.
Aphidoidea

Families

There are 10 families:
  • Anoeciidae
  • Aphididae
  • Drepanosiphidae
  • Greenideidae
  • Hormaphididae
  • Lachnidae
  • Mindaridae
  • Pemphigidae
  • Phloeomyzidae
  • Thelaxidae


Aphids, also known as
..... Click the link for more information.
Anisogamy (also called heterogamy) refers to a form of sexual reproduction involving gametes of different sizes. The smaller gamete is considered to be male (sperm cell) whereas the larger gamete is regarded as female (egg cell).

There are several types of anisogamy.
..... Click the link for more information.
A gamete (from Ancient Greek γαμετης; translated gamete = wife, gametes = husband) is a cell that fuses with another gamete during fertilisation (conception) in organisms that reproduce sexually.
..... Click the link for more information.
stamen (plural stamina, from Latin stamen meaning "thread of the warp") is the male organ of a flower. Each stamen generally has a stalk called the filament (from Latin filum, meaning "thread"), and, on top of the filament, an anther
..... Click the link for more information.
carpel is the outer, often visible part of the female reproductive organ of a flower; the basic unit of the gynoecium.

Carpel anatomy

The parts of the carpel are:
  • the stigma (from Ancient Greek stigma

..... Click the link for more information.
This article needs copy editing for grammar, style, cohesion, tone and/or spelling.
You can assist by [ editing it] now. A how-to guide is available, as is general .
This article has been tagged since April 2007.
..... Click the link for more information.
Homogametic sex refers to the gender of a species in which both sex chromosomes are identical. For example, in humans, females, with two X sex chromosomes, would be referred to as the homogametic sex while males, with one X and one Y sex chromosomes, would be referred to as the
..... Click the link for more information.


This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.
Herod_Archelaus


page counter