Answer:
Genes.
Explanation:
Genes are present on DNA that are inherited from parents to their offspring. Genes may be defined as the segment of DNA that ultimately form a particular protein product.
The particular trait of an organism is determined by the specific combination of the inherited genes. The genes are nearly same in all the human beings and there mutation can cause observable phenotype traits.
Thus, the correct answer is option (2).
Disruptive selection or diversifying selection describes the changes in population genetics where extreme values for a trait are favored over intermediate values.
So according to this definition, the conclusion can be derived as :
The most common circumference(s) to be after 10 generations of diversifying selection will be greater than 2 cm and less than 2 cm.
The tubercle found on the neck of a rib articulates with a facet found on the TRANSVERSE PROCESS OF A THORACIC VERTEBRA.
The tubercle refers to a small, rounded projection found on the surface of bones while a facet refers to the small, smooth area on a bone.
What this statement is saying is that, the tubercle that is located at one end of the rib formed a joint with the thoracic vertebra.
