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

Nutrition, mode of nutrition in tapeworm

mode of nutrition in tapeworm

Peristaltic movements of the intestines, Q. Which is the kind of muscle tis...

Q. Which is the kind of muscle tissue that performs the peristaltic movements of the intestines? The smooth muscle tissue is responsible for the peristaltic movements of the in

Cloning protocol, Sally Subcloner wants to clone a fragment into pUC19 (Map...

Sally Subcloner wants to clone a fragment into pUC19 (Map above – From New England Biolabs). Her fragment was a protein coding gene of 2.7 kb, and had XhoI sites on either end (and

.rRNA , rRNA structure and synthesis assignment

rRNA structure and synthesis assignment

Convulsive disorders, Convulsive Disorders Definition Convulsion ...

Convulsive Disorders Definition Convulsion is a series of forceful in voluntary contraction and relaxation of voluntary muscles due to disturbance of brain function. It i

Long-day plants (ldp) - plant responses to light-dark cycles, Long-Day Plan...

Long-Day Plants (LDP) - Plant Responses to Light-Dark Cycles The definition of this is exactly opposite to short-day plant. That is those plants which flower when given more t

Rate related bundle branch block, Q. Rate Related Bundle Branch Block? ...

Q. Rate Related Bundle Branch Block? The term has often implied the absence of significant coronary or myocardial pathology. It cannot be judged without taking the total clinic

Describe morphology of the embryo, Q. After the neurula stage and from its ...

Q. After the neurula stage and from its ventral portion to the dorsal how can the morphology of the embryo be described? In a schematic longitudinal section of the embryo after

Explain electrocardiography, Explain electrocardiography? What is mean...

Explain electrocardiography? What is meant by P-Q interval and S -T interval in electrocardiography? Mention two medical applications of this method.

Assignment, Write short note onApplications of apical dominance in horticul...

Write short note onApplications of apical dominance in horticulture and agriculture

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