Sage-Tips

What do you mean by dominance is not an autonomous feature of a gene?

The term autonomous means independent. Dominance is however not an autonomous feature of a gene. In some cases, the dominant gene expresses the phenotype irrespective of its homozygous or heterozygous condition. For eg. TT (homozygous) will produce Tall and Tt (heterozygous) will also produce Tall.

What is gene dominance?

Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.

In which case dominance is not an autonomous feature?

Dominance is not an autonomous feature of a gene in case more than one phenotype is influence by the same gene. Dominance is not an autonomous feature of a gene in case more than one phenotype is influence by the same gene.

Why law of dominance is not universally accepted?

The law of dominance is not universal because in certain cases such as in the case of incomplete dominance one allele shows incomplete dominance over the recessive allele and in codominance both the alleles are expressed.

How is dominance determined?

dominance, in genetics, greater influence by one of a pair of genes (alleles) that affect the same inherited character. If an individual pea plant with the alleles T and t (T = tallness, t = shortness) is the same height as a TT individual, the T allele (and the trait of tallness) is said to be completely dominant.

What is dominance and its types?

There are different types of dominance: incomplete dominance, co-dominance and complete dominance. Incomplete dominance occurs when there is a relationship between the two versions of a gene, and neither is dominant over the other so they mutate to form a third phenotype.

What is partial dominance genetics?

The phenomenon in which two true-breeding parents crossed to produce an intermediate offspring (also known as heterozygous) is called incomplete dominance. It is also referred to as partial dominance or intermediate inheritance. An organism consists of two alleles from each parent for one gene.

What is regular dominance?

Complete dominance occurs when one allele – or “version” – of a gene completely masks another. The trait that is expressed is described as being “dominant” over the trait that is not expressed.

Are somatic variations heritable?

An alteration in DNA that occurs after conception. Somatic mutations can occur in any of the cells of the body except the germ cells (sperm and egg) and therefore are not passed on to children.

Is dominance an autonomous feature of a gene?

Dominance is not an autonomous feature of a gene. It depends as much on the gene product and the production of a particular phenotype from this product. The term autonomous means independent. Dominance is however not an autonomous feature of a gene.

Is domindominance an autonomous feature?

Dominance is not an autonomous feature or the product that it has information for. Explaination: autonomous = independent. Lets say the above phrase is like “ DOMINANCE IS AUTONOMOUS”. Thne the dominant gene will always express the phenotype no matter whether it is in homozygour or in heterozygous condition. For eg.

Which alleles show incomplete dominance of starch grain size?

Heterozygotes produce round seeds, and so B seems to be the dominant allele. But, the starch grains produced are of intermediate size in Bb seeds. So if starch grain size is considered as the phenotype, then from this angle, the alleles show incomplete dominance.

How many alleles can be present in a single gene?

Since in an individual only two alleles can be present, multiple alleles can be found only when population studies are made. Occasionally, a single gene product may produce more than one effect. For example, starch synthesis in pea seeds is controlled by one gene. It has two alleles (B and b).