The answer is b. I am not sure exactly how to explain this, but it fits in much better with that question. I hope this could help you!
Answer:
They adapted with new traits to survive to new environments.
Explanation:
survival of the fittest
Man you need to change this to a different catagory
Researchers selected candidate genes by identifying homozygous tracts shared by all three siblings along with the parental phenotype, this type of study is applied for the inheritance of recessive genes. Since the recessive genes can not be expressed in heterozygous genotype, the back tracking of carriers and homozygous recessive individual will help understand its inheritance pattern. The inheritance of dyt2 can be autosomal recessive. It is usually passed on to progeny of two carriers.
