What is multiple alleles , Biology

Assignment Help:

What is Multiple Alleles ?

Obviously, diploid organisms, such as humans can have only two different alleles for a certain gene locus. However, new alleles are continuously being produced by mutations, so that within a species there may be multiple alleles for every gene.

The ABO blood type in humans is a familiar example of multiple alleles for a given trait. These genes control the synthesis of glycoproteins that protrude from the surface of red blood cells. Alleles for types A and B (IA and IB) are codominant. The allele IO for type O blood produces no glycoproteins at all, so both type A and type B are dominant over type O.

Individuals are either AA or AO, BB or BO, AB, or O. Alleles AO are classified type A, and BO are type B. Type O is always OO. Type B individuals have proteins called type A antibodies that cause Type A blood to clump in their blood. Type A individuals have type B antibodies, and Type O individuals have both type A and type B antibodies. Because they have no antibodies to either type A or type B glycoproteins and can receive blood donations from each of the blood groups, persons with type AB blood are called universal recipients. Persons with type O blood that does not contain glycoprotein antigens are universal donors.

 


Related Discussions:- What is multiple alleles

What is the parasite that causes giardiasis, Q. What is the parasite that c...

Q. What is the parasite that causes giardiasis? How is it transmitted and what are the typical manifestations of the disease? The Giardiasis is a protozoal infection caused by

Radiation sterilization, introduction of an assignment about radiation ster...

introduction of an assignment about radiation sterilization

Respiration, abnormal lung volumes and capacities

abnormal lung volumes and capacities

Illustrate the maturation of honey, Q. Illustrate the maturation of honey? ...

Q. Illustrate the maturation of honey? Honey is the oldest sweet food known to man. Although honey is a natural sweetener, it is considered a refined sugar because 96% of dr

Characteristics of the digestive system of earthworm, Q Which are the organ...

Q Which are the organs and characteristics of the digestive system of earthworms related to the kind of diet of these animals? Small organisms ingested together with soil parti

Explain the principle of development, Explain the Principle of Development ...

Explain the Principle of Development The final guiding principle is that assessment involves the measure of change, or development, across multiple levels of analysis. Developm

What is xaxim, Q. What is xaxim? Most pteridophytes have subterraneous ...

Q. What is xaxim? Most pteridophytes have subterraneous stems similar to the substrate called as rhizomes. Xaxim is a kind of pteridophyte with an aerial stem in generally perp

Define determinants of food security - vulnerability, Define Determinants o...

Define Determinants of Food Security - Vulnerability? It is the fourth critical variable and defines the risk factor to which a person, family, community or nation is exposed o

Flowering and endogenous rhythms, Flowering and Endogenous Rhythms Th...

Flowering and Endogenous Rhythms The last four decades of studies in animals and plant physiology have clearly established the existence of a biological clock mechanism to me

Explain about observation and classification of arthropoda, Explain about t...

Explain about the Observation and Classification of Arthropoda? Introduction In the previous unit you have examined the representatives of artliropoda.  In this unit, you wi

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