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

In what form do plants absorb calcium from the soil, a) In what form do pla...

a) In what form do plants absorb calcium from the soil? b) List any two calcium deficiency symptoms in plants.

Physiology of respiration, PHYSIOLOG Y OF RESPIRATION - 1 .      EXC...

PHYSIOLOG Y OF RESPIRATION - 1 .      EXCHANGE OF GASES - It is Haemotasis. It takes place in Alveoli between alveolar air and arterial cappilary by diffusion i.e., f

Define regulation of l-pk enzymes by starvation & refeeding, Define regulat...

Define regulation of L-PK enzymes by starvation & refeeding? L-PK catalyzes the conversion of phosphoenolpyruvate to pyruvate and plays an important role in directing pyruvate

What percentage of sons will show recessive phenotype, A woman who is heter...

A woman who is heterozygous for a particular X-linked recessive trait marries a phenotypically normal man. What percentage of their sons will show the recessive phenotype?

Major metabolic gases transported by the blood, Q. Which are the two major ...

Q. Which are the two major metabolic gases transported by the blood? The major metabolic gases transported by the blood are molecular carbon dioxide (CO 2 ) and oxygen (O 2 ).

Explain about the ascomycota - fungi, Explain about the Ascomycota - Fungi?...

Explain about the Ascomycota - Fungi? Ascomycota - Ascomycetes or sac-like fungi have septate mycelium. These are called so because sexual reproduction involves the formation o

Explain phylum zooflagellata, Phylum Zooflagellata (Animal Flagellates)...

Phylum Zooflagellata (Animal Flagellates) 1) At some stage of life-cycle they have one or more flagella. 2) They feed heterotrophically by absorption or phagocytosis, and

Do algae reproduce asexually or sexually, Q. Do algae reproduce asexually o...

Q. Do algae reproduce asexually or sexually? There are algae that reproduce asexually, There are algae that reproduce sexually and. In unicellular algae reproduction is usually

What are interferons, Interferons are small glycoproteins formed by virus-i...

Interferons are small glycoproteins formed by virus-infected cells that inhibit viral infection. They are heterogeneous. Gamma interferons induce MHC class II antigens in macrophag

Explain the sampling and analysis of microbial load, Explain the Sampling a...

Explain the Sampling and Analysis of Microbial Load? A food or equipment can be free of visible dirt and still be carrying microorganisms or chemicals that can cause food borne

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