Question

What is a gene?Explain the law of dominance.​

Answer 1

$\underline {\underline {\Huge \mathfrak {Answer ;}}}$

Gene is a part of DNA that encodes instructions that allow a cell to produce a specific protein or enzyme .

$\underline {\bold{Function :-}}$ So, the function of gene is to hold all the information required to make and regulate the expression of all the different proteins in cells.

$\underline {\bold {Law\:of \:Dominance}}$

☯ According to this law, characters are controlled by discrete units called factors, which occur in pairs with one member of the pair dominating over the other in a dissimilar pair.

☯ This law explains expression of only one of the parental character in F1 generation and expression of both in F2 generation.

Answer 2

Answer:

In biology, a gene is a sequence of nucleotides in DNA or RNA that encodes the synthesis of a gene product, either RNA or protein. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function. 

Law of Dominance states that dominant alleles always mask the recessive alleles. In heterozygous condition always dominant allele is expressed in F1 generation. The characters that appear in an F1 generation are called as dominant alleles and which are not expressed are recessive. For example, a cross between any pair of contrasting characters, always dominant character is expressed. But this law is not universal always.