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

Types of overpopulation - people overpopulation, Types of overpopulation - ...

Types of overpopulation - People overpopulation People overpopulation refers to a situation where there are more people than the supplies of food, water and other vital resour

Briefly explain what is the leaf, Briefly explain what is The Leaf? In a ...

Briefly explain what is The Leaf? In a typical dicot, leaf primordia arise from the apical meristem, which is housed within the terminal bud on a shoot. The leaf cells are produc

Define transport proteins in plasma, Define Transport Proteins in Plasma? ...

Define Transport Proteins in Plasma? Transport proteins, embedded in lipid membranes, make easy the import of nutrients into cells or the release of toxic products into the sur

Disadvantage of a monoculture, (a)What do you understand by the term 'monoc...

(a)What do you understand by the term 'monoculture'? (b) What is one disadvantage of a monoculture?   a) 'Monoculture' is the term applied to the growing

Predict whether narrowing or widening of the blood vessels, Body temperatur...

Body temperature is homeostatic ally regulated around a set point. Given your knowledge of negative feedback and homeostatic control system, predict whether narrowing or widening o

What are meninges and cerebrospinal fluid, What are meninges and cerebrospi...

What are meninges and cerebrospinal fluid? Meninges are the membranes that enclose and protect the central nervous system (CNS). Cerebrospinal fluid is the fluid that separates

Floral apex, Floral Apex Each plant must pass through a minimal 'ripe...

Floral Apex Each plant must pass through a minimal 'ripeness to flower' stage. That is, even to perceive and respond to a specific photoperiodic regime, a plant must be ready

What is the life cycle of the schistosome, What is the life cycle of the sc...

What is the life cycle of the schistosome? Male and female adult schistosomes live in blood vessels of the human intestines. The females release eggs that trespass the vessel w

Define functions of manganese, Define Functions of Manganese? Like othe...

Define Functions of Manganese? Like other micro minerals, Mn also functions in mammalian enzyme systems. It can function both as an integral part of metalloenzymes and as an en

............., notochotr is absent in the group ...........

notochotr is absent in the group ...........

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