Example of codominance, Biology

Assignment Help:

In shorthorn cattle, the coat colours red or white are controlled by a single pair of alleles. A calf which receives the allele for red coat from its mother and the allele for white coat from its father is called a 'roan'. It has an equal number of red and white hairs in its coat.

(a) Is this an example of codominance or of incomplete dominance?

(b) Give a reason for your answer. 

(c) Give one example in each case of (i) codominance, (ii) incomplete dominance, in humans.

 

(a) The roan calf exhibits codominance of the two alleles. 

(b) Every allele is fully expressed, i.e. neither allele is dominant.

 (c) (i) the ABO blood groups are instance of the codominance of the IA and the IB alleles.

(ii) Sickle-cell anaemia .is an instance of incomplete dominance. The recessive allele is partially expressed in the heterozygote.

 


Related Discussions:- Example of codominance

Explain membrane filtration technique, Explain Membrane Filtration Techniqu...

Explain Membrane Filtration Technique? Another method used for determining the bacterial number is the filtration technique. The margain figure illustrates the membrane filter

Show the major human diseases caused by fungi, Q. What are the major human ...

Q. What are the major human diseases caused by fungi? The main human diseases caused by fungi are paracoccidioidomycosis, histoplasmosis, blastomycosis, coccidioidomycosis, or

How to investigate mitral regurgitation by electrocardiogram, Q. How to Inv...

Q. How to Investigate mitral regurgitation by Electrocardiogram? Patients with severe mitral regurgitation often have atrial fibrillation. Left atrial enlargement is a common f

Explain the proteins stabilize emulsions, Explain The proteins stabilize em...

Explain The proteins stabilize emulsions The proteins stabilize emulsions and contribute  physical  and rheological properties,  like thickness,  viscosity, elasticity   and  r

Define some precautions for measurement of ph, Define some Precautions for ...

Define some Precautions for Measurement of pH? 1. Never touch the membrane of the glass electrode with anything else except soft tissue paper since it is fragile and is easily

What factor cause the measurement to change, During gym class Sally noticed...

During gym class Sally noticed that her friend Melissa always ran faster than her. Sally knew that they exercised equally, so she wondered what could cause Melissa to run so fast.

Stages of research process, Stages of Research Process: Planning Stage...

Stages of Research Process: Planning Stage The planning stage of research process  includes a  series of  interdependent steps consisting of 1)  conceptualizatioq of  the r

What are the typical vegetation, What are the typical vegetation and the ty...

What are the typical vegetation and the typical fauna of the tundra? Tundra has vegetation formed mainly by mosses and lichens. In the fauna the densely furred animals, like ca

Thermal properties-specific heat-water properties, Thermal Properties ...

Thermal Properties The range of temperature variatidn in the aquatic environment is smaller in comparison to air. This means the rate of change of temperature is slower in the

Endocrine interactions, Endocrine Interactions At the beginning of men...

Endocrine Interactions At the beginning of menstruation the inhibitory influence of the corpus luteum on the pituitary is removed and FSH is secreted in increasing amounts. Th

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