Explain crossing over in genetics, Biology

Assignment Help:

Explain Crossing Over in genetics?

Crossing over is when the arms of homologous chromosomes exchange segments (and therefore genes) with each other. Recall that one of the homologues originally came from the father's sperm and the other came from the mother's egg.

During Prophase I of Meiosis the homologous chromosomes pair up to form a tetrad. The arms of the chromatids overlap, and can sometimes swap portions. This exchange results in a genetic recombination of the parental genes, providing for genetic variation, the raw material for evolution.

 


Related Discussions:- Explain crossing over in genetics

What is the likely function of the snf gene, In yeast, a new mutation calle...

In yeast, a new mutation called suc was recently discovered.  The suc mutant cannot use sucrose as a source of carbon, and will not grow if the culture medium contains only sucrose

Explain expansion in red cells during pregnancy, Explain expansion in Red C...

Explain expansion in Red Cells during pregnancy? Production of red cells is stimulated and their numbers gradually rise.  However, as compared to the expansion in plasma volume

Feline calcivirus infection, Feline calcivirus infection This disease i...

Feline calcivirus infection This disease is caused by a virus under the family Caliciviridae. Its symptoms  include rhinitis, tracheitis and pneumonia. The animals are lethargi

Explain erythema migrans, Erythema migrans Oral antibiotic therapy sho...

Erythema migrans Oral antibiotic therapy shortens the duration of the rash and generally prevents development of late sequelae. Among the 3 drugs used for this indication, onl

Explain insect resistant crops - evolutionary, Insect resistant crops (IRC)...

Insect resistant crops (IRC) Insects are a natural selection pressure so plants resistant to certain insects could have an evolutionary advantage (in natural environments)

Explain oxidative phosphorylation, Explain Oxidative phosphorylation ...

Explain Oxidative phosphorylation Oxidative phosphorylation  : Synthesis of ATP  from ADP  and  Pi  during the passage of electrons in the respiratory chain.

Define issues that are covered by nutrition economics, Define issues that a...

Define issues that are covered by nutrition economics? The issues that are covered by nutrition economics include: 1. Quantities of food commodities and their development in

Law of diminishing return, Law of Diminishing Return A German scientis...

Law of Diminishing Return A German scientist Mitscherlich calculated the effect of different quantities of various growth factors on the yield of plants by means of a mathemat

Ways to adapt to stress, Ways to adapt to stress Now that you know the...

Ways to adapt to stress Now that you know the nature of stress, let us see what type of strategies plants have acquired to adapt to stress. You know that biological functions

Explain the complications of burns, Explain the Complications of Burns? ...

Explain the Complications of Burns? Most minor burns are superficial and do not cause complications. However, deep second-degree and third-degree burns swell and take more time

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