Answer:
The answer is (E) Gene duplication from replicating transposable elements.
Explanation:
Gene duplication from crossing over or unequal crossing over can leads to appearance of new DNA sequences. Then, the new sequences create new genes. It can also find in many text books as a chromosome mutation.
From C. exon shuffling, it is also a way to make new genes in which different exons from different genes can be bought together, or the same exon is duplicated. Thus, these causes change the DNA sequences.
Answer:
The heterozygote genotype has a different
phenotype from the homozygous dominant
genotype.
Explanation:
In codominance bothe genes are equally dominant. For example, AA is type A blood, BB is type B blood, but AB is type AB blood. Both genes are expressed in the phenotype.
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Answer:
- <u>Option:(1)-</u>The <u>Genetic drift </u>theory is an evolutionary concept that suggests that behaviors that help an organism survive are passed on while weak behaviors are lost.
Explanation:
According to this theory, an organisms faces different levels or kinds of environmental factors, which either suppresses or increases the level of a certain allele frequency inside an organisms genetic sequence, which then results in the change in behavior of that organism. And through many generations the changes in behavior may pass on from one to another, as the changes does not occur in a single generation.But, the alleles frequency are suppressed and increased with time, when they face different environmental factors or situations.