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

Define major arthropod classes, Q. How are the three major arthropod classe...

Q. How are the three major arthropod classes characterized according to the presence of wings? Arachnids and Crustaceans do not have wings. Most insects have wings.

What is complete transposition of arteries, What is complete transposition ...

What is complete transposition of arteries? Complete transposition of the great arteries (dTGA): The atria and ventricles are connected appropriately i.e., the right atrium dra

Activation domains, Unlike  DNA  binding  domains  and  dimerization  domai...

Unlike  DNA  binding  domains  and  dimerization  domains,  no  general  structural motifs have since been identified  in the activation  domains  of diverse transcription factors.

Define the criteria for an indicator organism, Define the Criteria for an I...

Define the Criteria for an Indicator Organism? Following criteria are suggested for an indicator organism: i. It should be suitable for the analysis of all types of water, i

Concept of nursing unit, CONCEPT OF NURSING UNIT: Concept in the desig...

CONCEPT OF NURSING UNIT: Concept in the design and facilities of nursing unit has been changed time to time based on the different categories of patients and peculiarities of

Define the effects of deficiency of calcium in the body, Define the effects...

Define the effects of Deficiency of Calcium in the Body? If there is a continued inadequate intake or poor intestinal absorption of calcium, plasma calcium concentrations will

Phosphate group, Shift of the phosphate group from carbon 3 to carbon 2 ...

Shift of the phosphate group from carbon 3 to carbon 2 Shift of thephosphate group form carbon 3 to carbon 2: This reversible reaction is  catalyzed by phosphoglycerate mutas

Expressed sequence tag (est), Expressed sequence tag (EST) is the short pa...

Expressed sequence tag (EST) is the short part of DNA sequence of corresponding to the fragment of the complementary DNA (made from the cell's messenger RNA). ESTs have been taken

Explain the origins of replication, Normal 0 false false fa...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

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