What is Thelytoky in zoology?
Thelytoky (from the Greek thēlys “female” and tokos “birth”) is a type of parthenogenesis in which females are produced from unfertilized eggs, as for example in aphids. Thelytoky can occur by different mechanisms, each of which has a different impact on the level of homozygosity.
What is Ameiotic Thelytoky?
1) Ameiotic Thelytoky: In ameiotic thelytoky, meiosis is suppressesd. The egg is produced by simple mitosis. As a result the egg is diploid. It generally occurs in crustacea and insects.
What is Amphitoky?
“What is Amphitoky?” This is a type of parthenogenesis where parthenogenetic egg may develop into the male or female individual. E.g., amphitoky occurs in Aphis.
What is Arrhenotokous parthenogenesis?
Arrhenotoky (from Greek -τόκος -tókos “birth of -” + ἄρρην árrhēn “male person”), also known as arrhenotokous parthenogenesis, is a form of parthenogenesis in which unfertilized eggs develop into males. Arrhenotoky occurs in members of the insect order Hymenoptera (bees, ants, and wasps) and the Thysanoptera (thrips).
How do you pronounce amoeba?
noun, plural a·moe·bas, a·moe·bae [uh-mee-bee].
What is meant by the term parthenogenesis?
parthenogenesis, a reproductive strategy that involves development of a female (rarely a male) gamete (sex cell) without fertilization. It occurs commonly among lower plants and invertebrate animals (particularly rotifers, aphids, ants, wasps, and bees) and rarely among higher vertebrates.
What is cyclical parthenogenesis?
Cyclical parthenogenesis (CP), in which organisms undergo several rounds of clonal reproduction followed by a sexual event, is one such life cycle. Many species, including crop pests (aphids), human parasites (trematodes) or models used in evolutionary science (Daphnia), are cyclical parthenogens.
What is Arrhenotoky and Thelytoky?
The arrhenotoky is a form of parthenogenesis in which the unfertilized eggs develop into males. In contrast, thelytoky is a form of parthenogenesis in which unfertilized eggs develop into females. Deuterotokous parthenogenesis (deuterotoky) is one in which the unfertilized eggs may develop into males and females.
