1. Explain the following terms : (i) neoteny (ii) polyembryony (iii) parthenogenesis
Answers
Answer:
Polyembryony is a condition in which a single egg develops into two or more embryos. In such a condition the single egg produces two or more genetically identical offsprings. It is seen in both plants and animals (including humans, where it results in the birth of identical twins).
Answer:
neoteny is the condition in which an organism reaches maturity without losing all of its juvenile characteristics.
When two or more than two embryos develop from a single fertilized egg, then this phenomenon is known as Polyembryony. In the case of humans, it results in forming two identical twins.
Parthenogenesis is a form of reproduction in which an egg can develop into an embryo without being fertilized by a sperm. Parthenogenesis is derived from the Greek words for “virgin birth,” and several insect species including aphids, bees, and ants are known to reproduce by parthenogenesis.