What are twins, Biology

Assignment Help:

What are twins? Genetically what are the two types of twins that can be generated?

Twins are simultaneously generated (within the mother's uterus) offspring. Twins classify according to zygosity as monozygotic or as dizygotic twins.

Monozygotic twins, also called as identical twins, are those originated from one single fertilized ovum (therefore from one single zygote); monozygotic twins are genetically identical, i.e., they have identical genotypes and are necessarily of the same sex. Dizygotic twins, also called as fraternal twins, are those generated from two different ova fecundated by two dissimilar sperm cells; so they are not genetically identical and they are not necessarily of the similar sex.

 


Related Discussions:- What are twins

What are extraembryonic membranes, What are extraembryonic membranes? E...

What are extraembryonic membranes? Extraembryonic membranes are membranous structures that appear in parallel with the embryo and play significant roles in the embryonic develo

Define cause of vitamin a deficiency - poverty and ignorance, Define cause ...

Define cause of vitamin a deficiency - Poverty and ignorance? Low purchasing power of the communities and their consequent inability to meet the nutrient requirements and tradi

Determine the term memory - psychological tests, Determine the term Memory ...

Determine the term Memory - Psychological tests The acquisition, reaction, and retrieval of new information is a domain of much importance in infants and young children at risk

Phylum protozoa, #question.sir please explain amoeba as in example of proto...

#question.sir please explain amoeba as in example of protozoa

Describe about development of sexual maturity in children, Briefly Describe...

Briefly Describe about Development of Sexual Maturity in Children? Sexual maturity develops along with growth spurt in adolescence. In girls, growth stops on attaining menarche

What is sanning membrane proteins, Which of the following is true for the f...

Which of the following is true for the following spanning membrane proteins? A. The mAChR (muscarinic Acetylcholine Receptor) is a spanning membrane protein located in the memb

Genetically modified foods-tomatoes, Normal 0 false false f...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Severity of heat treatment for pasteurization depends on, Define on which s...

Define on which severity of heat treatment for pasteurization depends? The severity of heat treatment for pasteurization depends on: 1.  Heat resistance of target microorgan

Active transport during membranes, Q Which are the molecules that make poss...

Q Which are the molecules that make possible active transport during membranes? Active transport is prepared by specific membrane proteins. These proteins are known as "pumps"

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd