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

Determine environmental factors of viscosity and plasticity, Environmental ...

Environmental factors of viscosity and plasticity a) Temperature affects the viscosity of a colloid. Generally, its viscosity decreases as the temperature increases. For e.g.

Zoonoses disease- taeniasis, Taeniasis Taeniasis is a zoonotic diseas...

Taeniasis Taeniasis is a zoonotic disease caused by specific cestodes. The two parasites of major importance are Taenia saginata and T. solium. Both in their adult forms, are

Character displacement and ecological exclusion, Consider two species of or...

Consider two species of organisms, species A and species B. Species A has a population in a community. Another population species B arrives into the same community, rather suddenly

Endosperm, 1. What are the examples of helobial endosperm

1. What are the examples of helobial endosperm

Explain pancreatitis, Explain Pancreatitis Pancreatitis :- Inflammati...

Explain Pancreatitis Pancreatitis :- Inflammation of the pancreas.

Inorganic salts, two inorganinc salts found in the body

two inorganinc salts found in the body

Radial artery , Radial artery: Carpentier used radial aartc14y us a condui...

Radial artery: Carpentier used radial aartc14y us a conduit for CABG in 197 1. He had 30 percent early occlusion of the graft and it was given up. The mail1 problem was radi

Explain about homo neanderthalensis, Homo neanderthalensis successfully liv...

Homo neanderthalensis successfully lived in the cold, harsh ice-age conditions of Europe until becoming extinct approximately 30 000 years ago. Adaptations which enabled them to s

Explain about the sucralose - artificial sweeteners, Explain about the Sucr...

Explain about the Sucralose - artificial sweeteners? Sucralose (1, 6-dichloro-1, 6-dideoxy-β-D-fructofuranosyl-4-chloro-4-deoxy-α-D- galactopyranoside) is the only non-nutritiv

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