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

How are the male gametophytes formed in angiosperms, Q. How are the male ga...

Q. How are the male gametes and the male gametophytes formed in angiosperms? In the anthers of every stamen there are pollen sacs. Inside the pollen sacs there are microspore m

What are mutagenic agents, What are mutagenic agents? The Mutagenic age...

What are mutagenic agents? The Mutagenic agents, or mutagens, are physical, chemical or biological factors that can cause alteration in DNA molecules. Instances of believed

Implications of pharmacogenomic research, Problem 1: Describe the funct...

Problem 1: Describe the functions of: a. Glutathione transferases b. Sulfotransferases. -Describe the functions of: a. Glutathione transferases Describe the functions of

What are the cytokinins, What are the cytokinins? And where are they made? ...

What are the cytokinins? And where are they made? The Cytokinins are phytohormones active in the promotion of cellular division they slow down the aging of tissues and act toge

Etiological factor of gastritis, Q. Etiological factor of gastritis? So...

Q. Etiological factor of gastritis? Some most frequently associated risk factors for gastritis include: • Faulty dietary habits like overeating and taking highly seasoned fo

Reprouction, which hormone is secret in salivary gland?

which hormone is secret in salivary gland?

Locomotion in mollusca, Locomotion in Mollusca The major locomotor or...

Locomotion in Mollusca The major locomotor organ in Mollusca is the foot, which is a characteristic feature of these animals. In its simplest form the foot is a flit ventral

Can you explain restrictive ventricular septal defect, Q. Can you explain ...

Q. Can you explain Restrictive Ventricular Septal Defect ? VSD is restrictive when VSD pressure gradient is more than 60mmHg (systolic cuff pressure-VSD lpressure grad

Which are the phases of the menstrual cycle, Which are the phases of the me...

Which are the phases of the menstrual cycle? The menstrual cycle is separated into two main phases: the follicular (or menstrual) phase and the luteal (or secretory) phase.

Platelet, What happens if platelets aren''t present in blood?

What happens if platelets aren''t present in blood?

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