In: Biology
Question 64
Mutations may be recessive because cells can increase the amount of functional protein produced from their remaining normal allele.
True False
Question 65
For genes which have multiple alleles, the relationships between those alleles can be a variety of types of dominant/recessive relationships.
False True
Ans. 65-True
Recessive mutations inactivate the affected gene and lead to a loss of function. For instance, recessive mutations may remove part of or all the gene from the chromosome, disrupt expression of the gene, or alter the structure of the encoded protein, thereby altering its function. Conversely, dominant mutations often lead to a gain of function. For example, dominant mutations may increase the activity of a given gene product, confer a new activity on the gene product, or lead to its inappropriate spatial and temporal expression.
Ans.66-True
Multiple alleles exist in a population when there are many variations of a genepresent. In organisms with two copies of every gene, also known as diploidorganisms, each organism has the ability to express two alleles at the same time. They can be the same allele, which is called a homozygous genotype. Alternatively, the genotype can consist of alleles of different types, known as a heterozygous genotype. Haploidorganisms and cells only have one copy of a gene, but the population can still have many alleles.