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

Acid indigestion, Acid indigestion It is also known as ruminal acidosis...

Acid indigestion It is also known as ruminal acidosis, acute carbohydrate engorgement, rumen over load or lactic acidosis. Ingestion of large quantities of highly fermentable c

Consciousness as inner state, Q. Explain Consciousness as inner state? ...

Q. Explain Consciousness as inner state? Consciousness as inner state: We are conscious of thoughts, images, emotions and memories within ourselves though they may not have phy

Sexual reproduction in animals, Sexual Reproduction All metazoans, if...

Sexual Reproduction All metazoans, if or if not capable of propagating asexually, produce special cells termed as gametes. The gametes may be either male gametes or sperms or

Cholesterol, CHOLESTEROL Other name is parental steroid. It is ...

CHOLESTEROL Other name is parental steroid. It is present all over the body but absent in cerebrospinal fluid. Cholesterol is found exclusively in animal food. It

Can we prevent ketoacidosis, Q. Can we prevent ketoacidosis? Normally, ...

Q. Can we prevent ketoacidosis? Normally, while maintaining a good sugar control, there is a very little danger of ketoacidosis. One should test for ketones under the following

Define working of body surface in excretion of zinc in human, Define workin...

Define working of Body surface in excretion of zinc in human? Loss of zinc occurs due to the exfoliation of skin and sweating (0.7 -1.0 mg/day). Another route of zinc loss is h

Stems transport liquids, Stems transport liquids (a)  Cut about 2 cm fr...

Stems transport liquids (a)  Cut about 2 cm from the end of stems of celery and place them in cold water for about an hour to freshen. Next place the stems in dishes having red

Explain about the microbiological study of water, Explain about the Microbi...

Explain about the Microbiological Study of Water? Water is the basic need of life. River, streams and underground water is the prime source for water. However, disposal of indu

Foods for growth in microorganisms, Q. Foods for Growth in microorganisms? ...

Q. Foods for Growth in microorganisms? Microorganisms differ in their ability to use various nitrogenous compounds as a source of nitrogen for growth. The primary nitrogen sour

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