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 typical shape of a population growth curve, Q. What is the typi...

Q. What is the typical shape of a population growth curve? How can the biotic potential be represented in the same way graphically? A usual population growth curve number of in

Implications of pharmacogenomic research, Problem 1: Describe the funct...

Problem 1: Describe the functions of: a. Glutathione transferases b. Sulfotransferases. -Describe the functions of: a. Glutathione transferases Describe the functions of

Define the concept of ventilation, Which of the following are true for vent...

Which of the following are true for ventilation? A. The problems with ventilation induced by injection of curare occur because of the drug's direct action on nicotinic ACh Rec

Types of development of animals, Types of Development of Animals Diffe...

Types of Development of Animals Different animals have evolved various methods of development. These methods can be broadly categorized into two categories (i) Direct devel

Define conservation genetics and hybridization, Define Conservation genetic...

Define Conservation genetics and hybridization? Is the genetic integrity of European wolves threatened by hybridization along with free-ranging dogs? To ascertain the extent of

Explain about the term- therapeutic, Explain about the term- Therapeutic ...

Explain about the term- Therapeutic Therapeutic approaches that scientists are pursuing include transplanting cells to replace those which are damaged or using growth factors

Monosaccharide derivatives, MONOSACCHARID E DERIVATIVES They are modif...

MONOSACCHARID E DERIVATIVES They are modified monosaccharides. G L YCOSIDES They are compounds formed by condensation reaction between a sugar and hydroxyl group

Digestive system - tongue, TONGU E - On the tongue 4 types of p...

TONGU E - On the tongue 4 types of papillae are present. (i) Filliform - Filliform papillae are most abundant and have no taste bunds. Filliform papillae

What is the life cycle type of bryophytes, Q. What is the life cycle type o...

Q. What is the life cycle type of bryophytes? As in all plants the life cycle of bryophytes is diplobiontic (alternation of generations) and in bryophytes the lasting form is t

Common disorders of coronary heart diseases, Q. Common Disorders of Coronar...

Q. Common Disorders of Coronary Heart Diseases? We shall deal with different types of heart diseases, their- etiology, symptoms, complications, as well as, nutrition and dietar

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