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

Taxonomy, classification of grantia

classification of grantia

Cattle and buffalo diseases, C a ttle and buffalo diseases Rinderpes...

C a ttle and buffalo diseases Rinderpest: Rinderpest is the most destructive of the virus diseases of cloven-footed animals, viz. cattle, buffaloes, sheep, goats, pigs and

What is this atp synthesis called, How in the respiratory chain do electron...

How in the respiratory chain do electrons from FADH2 and NADH2 passing through cytochromes liberate energy for the ATP synthesis? What is this ATP synthesis called? FADH2 and N

Flagellated protozoan, Flagellated Protozoan These are protozoan th...

Flagellated Protozoan These are protozoan that move by means of one or more flagella and include the largest number of species, about 6,800.  Asexual reproduction is by

Issues to be discussed while counselling a diabetic patient, Q. Issues to b...

Q. Issues to be discussed while counselling a diabetic patient ? Issues to be discussed · Counselling at Diagnosis · Diabetes is Controllable · Counselling for Day

Diagnostic clues - peripheral vascular disorders, Diagnostic Clues 1)...

Diagnostic Clues 1) When pallor, decrease in temperature, and numbness are the only complaints, viability of the limb usually not threatened. A condition of pain, pallor,

Why are glucorticoids used in transplant patients, Why are glucorticoids us...

Why are glucorticoids used in transplant patients? Patients with transplanted organs are prone to host versus graft rejection as their own immune system tends to attack the gr

Which compounds results from cyclization of glucose, Which of the following...

Which of the following compounds results from cyclization of glucose? Select one: a. alpha-D-glucopyronose b. beta-D-glucopyronose c. alpha-D-glucofuranose d. beta-D

Major endocrine glands of the human body, Q. What are the major endocrine g...

Q. What are the major endocrine glands of the human body? The major endocrine glands of the human body are the hypophysis (or pituitary), the pineal gland (or pineal body), the

Mollusca, in molluscathe foot is used for (capturing locomotion or both

in molluscathe foot is used for (capturing locomotion or both

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