How genes can be exchanged between chromatids, Biology

Assignment Help:

Q. How Genes can be exchanged between chromatids?

When two homologous chromosomes physically exchangecorresponding segments during prophase I of meiosis, geneticists call it crossing over. Recombinations take place at chiasmata during pachytene of meiosis-I. If just a few exchanges take place, genes which are closer together are likely to stay together. The farther apart on same chromosome genes are, more likely they will separate during recombination. The two extremes are independent assortment and absolute or complete linkage. Progeny resulting from crossing over appear in repeatable proportions, known as recombinant frequency. Greater recombination frequencies are observed for genes which are farther apart on chromosomes as a chiasma is more likely to cutbetween genes which are far apart than genes that are closer together.


Related Discussions:- How genes can be exchanged between chromatids

What is myocardial infarction, Q. What is myocardial infarction? The My...

Q. What is myocardial infarction? The Myocardial infarction is the condition in which an area of this tissue or the entire heart muscle dies by hypoxia due to lack of blood irr

Development of reserves - conservation of wildlife, Development of Reserves...

Development of Reserves - Conservation of Wildlife Establishment of Biological reserves, National parks, Forest reserves, Wildlife refuges and Biosphere reserves are effective

Physical properties of protoplasm, P HYSICA L PROPERTIES OF PROTOPLASM - ...

P HYSICA L PROPERTIES OF PROTOPLASM - 1 .       Phase reversal - Due to difference in temperature outer part is gel and inner part of sol 2.       Tyndall effect - Be

What are x-linked traits, What are X-linked traits? The X-linked traits...

What are X-linked traits? The X-linked traits are the phenotypical traits conditioned by genes located in the nonhomologous (heterologous) portions of the X chromosome.

Why tpp and ttp are vital for the nerves and cardiac tissues, Why TPP and T...

Why TPP and TTP are vital for the nerves and cardiac tissues? TPP and TTP are interconvertible and arc involved in carbohydrate metabolism. As discussed above, when there is in

The hybridization reaction, As double-stranded DNA is heated a temperature ...

As double-stranded DNA is heated a temperature is reached at that the two reaction strands divided.  This procedure is called as denaturation.  The temperature at that half of the

Explain the term ferns, Explain the term Ferns? Ferns are plants that...

Explain the term Ferns? Ferns are plants that have vessels that conduct water, minerals, and nutrients, and reproduce through spores, rather than seeds. Ferns are therefore o

What are the plant hormones, What are the plant hormones? The Plant hor...

What are the plant hormones? The Plant hormones also called as phytohormones, are the substances that control the embryonic development and the growth of the adult plant.

Manufacture of metallurgical coke, Using high temperature carbonization, me...

Using high temperature carbonization, metallurgical coke  (hard coke) can be prepared by two processes. 1.      Beehive coke oven process. 2.      Otto-hoffmann's by-product

Role of biotic factors inducing senescence, Role of Biotic Factors Inducing...

Role of Biotic Factors Inducing Senescence Besides environmental and endogenous factors, biotic factors also play a role in inducing senescence. For example, due to an attack

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