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

Illustrate about the non-concomitant, Non-concomitant or Paralytic Squint ...

Non-concomitant or Paralytic Squint This subdivision of manifest squint occurs when there is a deviation of the eye in different directions. The causes for non-concomitant squ

Agro industrial-animal wastes, Animal wastes Large quantities of anima...

Animal wastes Large quantities of animal wastes are available in the country but generally they are low in nutrient content with poor feeding value to the animals. However, po

Structure of the vascular cambium, Structure of the Vascular Cambium T...

Structure of the Vascular Cambium This meristem, in the anatomical sense of the term usually includes two histologically distinct kinds of cells: i) Fusiform Initials, i

Describe the process of crassulacean acid metabolism, Describe the process ...

Describe the process of Crassulacean acid metabolism. a) How is it advantageous to plants? b) Describe the major steps in Krebs cycle. Why is this cycle also called citric a

List the steps of mitosis, Q. List the steps of mitosis and briefly describ...

Q. List the steps of mitosis and briefly describe what happens in each.

What are the intermediate hosts of plasmodium, What are the intermediate an...

What are the intermediate and the definitive hosts of the plasmodium? In the life cycle of the plasmodium humans are the middle hosts (where asexual reproduction takes place) a

Explain the indirect methods of microbial estimation, Explain the Indirect ...

Explain the Indirect Methods of Microbial Estimation? Indirect methods, i.e., methods other than those counting the microbial cells can also be used for quantitation purpose. T

Explain acute mr murmur in heart dieases, Explain Acute MR Murmur in heart ...

Explain Acute MR Murmur in heart dieases? MR due to ruptured papillary muscle, ruptured chordae tendinae, or due to Infective Endocarditis/Myocardial infarction. Characteri

Categories of secondary inductions, Categories of Secondary Inductions ...

Categories of Secondary Inductions The secondary inductions are categorized into two types. 1) Instructive Interaction : In such type of an interaction the inducing tissue

Explain the procedure of balloon pulmonary valvuloplasty, Q. Explain the pr...

Q. Explain the procedure of Balloon Pulmonary Valvuloplasty? Right heart study is done to measure the transvalvular gradient and exclude supravalvular and subvalvular component

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