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 monera, What is monera? One of the 5 main kingdoms contains bac...

What is monera? One of the 5 main kingdoms contains bacteria and blue/green algae. Does NOT have a cell membrane, or in other words, is made of prokaryotic cells. Actually,

Is water a non-polar or a polar molecule, Q. Is water a non-polar or a pola...

Q. Is water a non-polar or a polar molecule? What is the consequence of that characteristic for the function of water as solvent? Ans. Water is made of two atoms of hydrog

Effects on weather - air pollutants, Effects on Weather - Air pollutants ...

Effects on Weather - Air pollutants Dust, smoke and other suspended particulate matter reduce visibility. Fly-ash also affects visibility by intercepting and scattering solar

Explain the toxicity of vitamin d, Explain the Toxicity of Vitamin D? ...

Explain the Toxicity of Vitamin D? The adverse effects of high vitamin D intakes include hypercalciuria (excessive urinary calcium excretion) and hypercalcaemia (high concentr

Simple febrile convulsions, Simple Febrile Convulsions These are convu...

Simple Febrile Convulsions These are convulsions associated with fever and infection, and is commonest causes of seizures during infancy and early childhood. These convulsio

Surgical considerations in anterior mandibular region, Surgical Considerati...

Surgical Considerations in anterior mandibular region During the harvesting of a monocortical symphyseal block of bone from the mandibular symphysis region (autogenous block bo

Discuss the genetics involved in the inheritance, Casein is the main protei...

Casein is the main protein in milk. There are three types of casein, one of which is beta casein. Beta casein comes in two main variants called A1 and A2. The order of amino acids

Composition of cell membrane, COMPOSITION Proteins = 44-76%,  Lipids...

COMPOSITION Proteins = 44-76%,  Lipids = 20-53%,      Carbohydrates = 1-8%,  (Protein-Lipid ratio = 0.8 : 1 to 4 : 1) Most of lipid are "Phospholipids" which are amphipat

Illustrate about the intra-ocular pressure, Illustrate about the Intra-ocul...

Illustrate about the Intra-ocular pressure It is the pressure maintained inside the eye above the atmospheric pressure. It is higher than fluid pressure in any other tissue (2-

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