Ref: online search (Changes to short stretches of nucleotides are called gene-level mutations, because these mutations affect the specific genes that provide instructions for various functional molecules, including proteins. Changes in these molecules can have an impact on any number of an organism's physical characteristics.)
<h2>Answer:</h2>
When the crossing over results in both mutant alleles on one chromosome and the other chromosome will be mutation free.
<h3>Explanation:</h3>
During the meiosis chromosomes are present in homologous form in a pair.
They exchange their genetic material with each other. This exchange is random and usually genetic material on the ends/telomere changes with the homologous chromosome.
In given condition the exchange is in such manner that the mutant allel of one chromosome shifts to other during crossing over. While other chromosome also contains its own mutant allele and does not exchange it during crossing over.
The answer is Genus and Species
Answer:
Only the dominant one is <u>expressed</u>.
The correct answer is "early in b cell development, recombinase links one light-chain v gene segment to one j gene segment".
Recombinase is an enzyme whose function is genetic recombination. There are many different types of recombinase and one of these is the V(D)J recombination. This is a recombination occurring in developing lymphocytes during the beginning of the maturation of T and B cells. V(D)J recombination involves somatic recombination and its basis is the random rearrangement of variable (V), joining (J) and diversity (D) gene segments. This process ensures the lymphocyte diversity seen in all the different types of antibodies and T cell receptors found on B and T cells.
