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

Zoology, find the habits and habitats of scyphas?

find the habits and habitats of scyphas?

What are steroid hormones , Cholesterol is the precursor of the five major...

Cholesterol is the precursor of the five major classes of steroid hormones.The synthesis of steroid hormones is initiated by the removal of a six-carbon unit  from  carbon  20  of

Explain management strategies for genetically modified crops, Explain Manag...

Explain Management strategies for genetically modified crops? Crops that have been genetically modified (GM) to be toxic to insect pests are now common in US agriculture. Make

Explain sodium, Explain Sodium Sodium (Nu)  :  In  sodium-restricted di...

Explain Sodium Sodium (Nu)  :  In  sodium-restricted diets, no salt  is added to the diet which still provides approximately 50 mmoL Na. Foods containing high Na content must b

Define features of fusarium - fungi and yeast, Define features of Fusarium ...

Define features of Fusarium - Identification of Fungi and Yeasts? Identifying features of Fusarium: 1. Wooly, white fuzzy colonies changing colour to pink, purple or yellow.

Define the armamentarium, Define the Armamentarium a) Micro-mirrors (ma...

Define the Armamentarium a) Micro-mirrors (magnification: x 40, Size: 0.5) b) Micro-probe c) Micro-blades, tissue retractors d) Burs e) Retrograde Tips "round bur

How to calculate fractional shbrtening, Q. How to calculate Fractional Shbr...

Q. How to calculate Fractional Shbrtening? With the cursor- beam cutting the left ventricle just beyond the tips of mitral valve in an adequate parasternal long axis view,

Mm, #questionmmmm

#questionmmmm

What is neurotransmitter, What is neurotransmitter Consider Neuron B i...

What is neurotransmitter Consider Neuron B in the frog central nervous system whose plasma membrane has a previously unknown channel that is selectively conductive to a newly

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