In general what is the cause of the aneuploidies, Biology

Assignment Help:

In general what is the cause of the aneuploidies?

In general the aneuploidies are caused by impaired assortment of chromosomes during meiosis. For instance, when the homologous chromosomes of the pair 21 do not separate gametes with two chromosomes 21 and gametes without chromosomes 21 form. If the gamete with two chromosomes 21 fecundates a normal gamete of the opposite sex the zygote will present trisomy (three chromosomes 21). If the gamete without chromosomes 21 fecundates a normal gamete of the opposite sex there will be a zygote with monosomy (with only one chromosome 21).

Defects in the separation of chromosomes during cell division are called chromosomal nondisjunctions. During the meiosis nondisjunctions may occur in the anaphase I (nondisjunction of homologous) as well in anaphase II (nondisjunction of sister chromatids).

 


Related Discussions:- In general what is the cause of the aneuploidies

Water soluble vitamins, Water Soluble Vitamins B-vitamins are abundant...

Water Soluble Vitamins B-vitamins are abundant in milk and other feeds. B-vitamins are synthesized by rumen microorganisms, beginning soon after a young animal begins feeding.

Explain lipids, Explain lipids? Lipids : Lipids function as energy-sto...

Explain lipids? Lipids : Lipids function as energy-storing molecules such as fats and oils, protective waxes, digestive tract lubricants, heat insulation such as whale blubber

Regeneration in hydra, Regeneration in Hydra You previously know that...

Regeneration in Hydra You previously know that the Hydra has spectacular regenerative ability. The hydra is a small tubular, two layered fresh water animal computing 20mm in

Cnidaria and protozoan, What are the advancement of cnidaria over protozoa

What are the advancement of cnidaria over protozoa

The immediate effects of exercise on the heart and the lungs, (a) What are ...

(a) What are the immediate effects of exercise on the functions of (i) the heart, (ii) the lungs, (iii) the liver? (b) How do these changes help to meet the needs of exercise

Carbohydrate metabolism, CARBOHYDRATE METABOLISM Carbohydrates  are  br...

CARBOHYDRATE METABOLISM Carbohydrates  are  broken down into  monosaccharides which are absorbed into  the  blood stream.  In  the  liver and muscles, most  of  the glucose  is

Temperate shrublands, These are areas where woody shrubs predominate rather...

These are areas where woody shrubs predominate rather then trees. In regions with a Mediterranean type of climate i .e., hot dry summers and cool wet winters, shrubs grow close tog

In hormonal terms why does menses occur, Q. In hormonal terms why does mens...

Q. In hormonal terms why does menses occur? Menses is the endometrial monthly desquamation that occurs as the progesterone and estrogen levels fall after the regression of the

Explain the mechanisms of heat loss, Name and explain the mechanisms of hea...

Name and explain the mechanisms of heat loss that are contributing to Joel's feelings of coldness. Be sure to name ALL the mechanisms that are contributing!

Disinfectant, General information about disinfectants A disinfectant is...

General information about disinfectants A disinfectant is a chemical that kills disease-causing agents on contact. Natural disinfection agents, such as sunlight, heat, keeping

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