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

Morphology in relation to taxonomy, Q. Morphology in relation to taxonomy? ...

Q. Morphology in relation to taxonomy? Morphology is the basic tool of taxonomy, because identification is primarily based on the characters of the plant. The morphological cha

Explain threaded implants, Q. Explain threaded implants? Cylindrical no...

Q. Explain threaded implants? Cylindrical non-threaded implants poorly distribute compressive forces and generate shears forces that may fragment and break the bone surrounding

Explain the copper toxicity in human, Explain the Copper Toxicity in Human?...

Explain the Copper Toxicity in Human? Acute copper toxicity in humans is rare and occurs due to inadvertent consumption of copper salts. Symptoms include vomiting, diarrhoea, h

Define amino acids in the building blocks of proteins, Define Amino Acids i...

Define Amino Acids in the Building Blocks of Proteins? Amino acids, as you have already illustrated, have a carboxyl group and an amino group bonded to a common carbon atom and

What is subphylum vertebrata explain, What is Subphylum Vertebrata explain?...

What is Subphylum Vertebrata explain? This large group of animals takes its name from its distinguishing feature: the vertebral column, or the backbone. The backbone made of se

Describe the nature of the enzymes, Describe the nature of the enzymes invo...

Describe the nature of the enzymes involved in the phosphorylation of glucose Phosphorylation of glucose: Glucose is converted to glucose-6-phosphate since phosphorylated inter

Atp, ATP The energy currency of the body One of the monomers u...

ATP The energy currency of the body One of the monomers used in the synthesis of RNA Contains three phosphate groups àhigh energy Removal of one releases e

What are instances of a carnivorous, Q What are instances of a carnivorous ...

Q What are instances of a carnivorous and an herbivorous reptile? Iguanas are herbivorous, Snakes are carnivorous. Q. Do beings of the class Reptilia perform gas exchange i

10 mcq question of plants, 10 mcq question in the topic of plants of 9th st...

10 mcq question in the topic of plants of 9th standard

Synthesis of hormones - testies, Synthesis of Hormones - Testies Leyd...

Synthesis of Hormones - Testies Leydig cells and the Sertoli cells are the steroid hormone synthesising cellular sites of the testis. Leydig cells are the major source of the

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