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 is the significance of spicules, What is the significance of Spicules?...

What is the significance of Spicules? Any needlelike structure. This term is very often thought of in conjunction with sponges and refers to needlelike structures produced by s

Photosynthesis carbon dioxide, Q. Why is it said that during photosynthesis...

Q. Why is it said that during photosynthesis carbon dioxide is improved to form glucose? During photosynthesis carbon dioxide is energetically improve with hydrogen from water.

Explain the skeletal system, Explain the Skeletal System? Skeletal Sys...

Explain the Skeletal System? Skeletal System: The support framework, or skeleton, in the human body is composed of mostly hard mineral substances. Unlike crustaceans or insec

Explain xylose isomeras, Explain xylose isomeras A mixture of glucose ...

Explain xylose isomeras A mixture of glucose and fructose, is produced from sucrose by the action of yeast invertase (β-fructofuranosidase), an enzyme which can only be extrac

Symmetry, what is the differences between spherical symmetry and radial sym...

what is the differences between spherical symmetry and radial symmetry

Define absorption, Define Absorption, Storage and Elimination of Pyridoxine...

Define Absorption, Storage and Elimination of Pyridoxine? Pyridoxine, pyridoxal and pyridoxamine (along with their phosphorylated forms) occur in plant and animal foods. The ph

Overturn - thermal stratification, Overturn - Thermal stratification T...

Overturn - Thermal stratification The summer or winter stratification is seasonal. Circulation of lake water occurs twice a year, in the spring and autumn (fall) seasons by a

Show the stages in which the cell respiration is divided, Q. What are the t...

Q. What are the three stages into which the cell respiration is divided? The three stages of aerobic cell respiration are glycolysis, Krebs cycle and respiratory chain also kno

What are proteins and why they are important for us, What are Proteins and ...

What are Proteins and Why they are important for us? We just read that proteins are essential for maintaining and sustaining life. What are proteins or what constitutes protein

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