HEREDITY
MUTATIONS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
removing a DNA base at a point in the gene.
|
|
|
the addition or removal of a chromosome by a meiosis error.
|
|
|
substituting a DNA base at a point in the gene, with a different one.
|
|
|
mixing segments of the same gene, from two parents, during crossing-over in meiosis.
|
Detailed explanation-1: -Expert-Verified Answer. c) mixing segments of the same gene, from two parents, during crossing-over in meiosis. Alleles cannot be created by the addition or removal of a chromosome by a meiosis error.
Detailed explanation-2: -Answer and Explanation: Mutation is the only way to produce new alleles in a population. This can create minor differences in the allele frequencies of the population. It lead to variation in DNA sequences that can result in the formation of new genotypes.
Detailed explanation-3: -Recombination is a process by which pieces of DNA are broken and recombined to produce new combinations of alleles. This recombination process creates genetic diversity at the level of genes that reflects differences in the DNA sequences of different organisms.
Detailed explanation-4: -Answer and Explanation: It is during meiosis II that the two alleles separate. In Meiosis I the duplicated chromosomes come together to form structures called tetrads. In each tetrad, there are four alleles that separate to give rise to two cells with two alleles each.
Detailed explanation-5: -Genes on separate chromosomes, such as Gene 5 and Gene 6, are never linked (bottom illustration). Each gamete gets a single copy, determined at random, of each chromosome. Because there is nothing holding them together, the alleles can pass to gametes in any combination.