Geneticist have determined that the majority of individuals in an isolate island population have blood type b. type a blood is f
ound to be more common in the mainland populations from which the island was settled. how would a geneticist explain the dominance of blood tpe b in the island population. A- Random mutations have occurred in the island population.
B- Genetic drift has reduced the frequency of type A individuals.
C- Natural selection has only occurred in the mainland population.
D- Environmental conditions on the island are less favorable for type B individuals.
B. Genetic drift has reduced the frequency of type A individuals,which <span>explains the dominance of blood type b in the island population.
</span>Genetic drift is a<span> mechanism of evolution </span>during which allelomorph<span> frequencies of a population </span>modification<span> over generations </span>because of <span>sampling error. The Genetic drift </span>happens in<span> populations of non-infinite size, </span>however<span> its effects </span>are<span> strongest in </span>tiny<span> populations.</span>
The correct answer is genetic drift has minimized the frequency of type A individuals.
Usually, genetic drift takes place in small populations, where infrequently happening alleles encounter with a greater chance of getting lost. Once it starts, genetic drift will continue until the involved allele is the only allele present in a population at a specific locus or until the allele involved is lost.
In the given case, allele A is lost due to genetic drift phenomenon.
According to Mendel something was being stably passed down, unchanged, from parent to offspring through the gametes, over successive generations. He called these things as ‘factors’ now called as genes. Genes, therefore, are the units of inheritance.
They contain the information that is required to express a particular trait in an organism.
Genes which code for a pair of contrasting traits are known as alleles, i.e., they are slightly different forms of the same gene.
There is no ambiguity that the genes are located on the DNA, it is difficult to literally define a gene in terms of DNA sequence.
The DNA sequence coding for tRNA or rRNA molecule also defines a gene. A cistron is defined as a segment of DNA coding for a polypeptide, the structural gene in a transcription unit could be said as monocistronic (mostly in eukaryotes) or polycistronic (mostly in bacteria or prokaryotes).
I believe the left chamber has a higher concentration of neon gas because it has more neon atoms in it, and the right chamber has a higher concentration of helium gas because it has more helium atoms in it.
