With the help of one example, explain the phenomena of co-dominance and multiple allelism in human population.

Solution

The phenomenon of multiple allelism and co-dominance is shown by the ABO blood group in human beings. The gene I for the blood group contains three alleles i.e. I^A, I^B and i which represents the phenomenon of multiple allelism as it has more than two alleles governing the same character. The alleles I^A and I^B are co-dominant and express themselves even in the presence of the other. Thus the presence of both the alleles I^A and I^B gives the blood group of AB.

Some More Questions From Organisms and Populations Chapter

In which of the following interaction both species are benefitted ?

Fill in the blanks with suitable words :

1. The optimal capacity of the organism to produce offspring is called........................

2. Rapid increase in human population is called........................

3. Mathematical expression of the growth of population is called........................

4. Yeast cells grown in a culture medium show........................growth curve.

5. Main cause of population explosion is........................

State true or false :

Coin one word for the following statements :
1.Organism that can tolerate only a narrow range of salinity.

2. Plants that can survive a wide range of temperature.

3. Interaction of two species in which one is benefited while other is neither benefited nor harmed.

4. Number of births during a given period in the population that are added to the initial density.

5. the process of maintaing a constant body temperature.

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Organisms And Populations

With the help of one example, explain the phenomena of co-dominance and multiple allelism in human population.

Some More Questions From Organisms and Populations Chapter

In which of the following interaction both species are benefitted ?

State true or false :

A few organisms can tolerate and thrive in a wide range of temperature, they are called........................

Majority of organisms are restricted to a narrow range of temperature, such organisms are called ........................

The organisms ideally try to maintain the constancy of its internal environment by the process called........................

Mammals from colder climates have shorter ears and limbs to minimize heat loss. This rule is called........................

The parasites that feed on external surface of host organisms are called ........................

The parasites that live inside the body at different sites (liver, kidney, lungs, RBC etc.) are called........................

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