Answer:
Mendel is known as the father of genetics. He explained the law of segregation by the monohybrid cross. The monohybrid cross involves the cross of a single trait at a time.
Law of segregation explains that at the time of formation of gametes, the allele pairs get separated from the pairs of trait. The concept of dominance was also explained. The traits that express itself even in the heterozygous condition is known as dominant trait (T). The trait that can not express itself is known as recessive trait (t).
For example:
Parents TT × tt. (Laws of segregation)
Gamete T t
F1 generation Tt.
Selfing of F1 generation
Tt × Tt
Offspring : TT (tall) , Tt (tall) , Tt (tall) , tt (dwarf).
The phenotypic ratio is tall : dwarf (3 : 1)
The change in crab color is an example of Disruptive selection because two extreme colors were preferred over the more moderate color. Thus, the correct option for this question is D.
<h3>What is Natural selection?</h3>
Natural selection may be defined as the selection of a few individuals from any given population according to their favorable variations.
Disruptive selection occurs when environmental conditions changes in two different directions. Due to which variance increases in population.
Therefore, the correct option is D.
To learn more about Natural selection, refer to the link:
brainly.com/question/14385908
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Answer: According to international conventions, human autosomes, or non-sex chromosomes, are numbered from 1 to 22, in descending order by size, with the exceptions of chromosomes 21 and 22, the former actually being the smallest autosome. The sex chromosomes are generally placed at the end of a karyogram.
I Would Say The Answer Is B. False.
