Differentiate between the following: Dominance and Recessive
Answer
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Hint: Individuals obtain from each parent two copies of each gene, known as alleles. One allele will be expressed if the alleles of a gene are different or heterozygous. An example is a V-shaped hairline. The other allele's influence will be masked. An example is a straight hairline.
Complete step by step answer:
Note: If both dominant and recessive alleles are present, then the person will be heterozygous for that gene pair. In this case, only the dominant trait will get expressed and the recessive allele will not get expressed. Human blood group inheritance is an example of dominance and recessive trait inheritance. The blood group A, B, O are regulated by the gene I. A and B blood groups are dominant over the I gene whereas the O blood group is recessive.
Complete step by step answer:
| Dominance | Recessive |
| According to the law of dominance, one allele in a gene pair will be dominant over the other allele and it is called the dominant allele. | The other allele called the recessive allele will be recessive over the other allele. |
| If a gene pair is homozygous for the dominant allele, then the dominant character will get expressed. | If the gene pair is homozygous for the recessive alleles, then the recessive character will get expressed. |
| The dominant allele is represented in capital letters. | The recessive allele is represented in small letters. |
| Some of the dominant features observed in Indians are:- Right handedness- V- shaped hairline.- Almond- shaped eyes- Dark hair- Detached earlobes | Some of the recessive features observed in Indians are:- Left- handedness- Straight hairline- Round eyes- Blond hair, red hair- Attached earlobes |
Note: If both dominant and recessive alleles are present, then the person will be heterozygous for that gene pair. In this case, only the dominant trait will get expressed and the recessive allele will not get expressed. Human blood group inheritance is an example of dominance and recessive trait inheritance. The blood group A, B, O are regulated by the gene I. A and B blood groups are dominant over the I gene whereas the O blood group is recessive.
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