In the pedigree shown, the presence of a dominant autosomal genetic disorder is indicated by a shaded box. this is an autosomal inheritance, not a sex-linked trait. part a: determine whether or not either of the parents (1 or 2) could be homozygous for the trait in question. explain your answer in 1-2 complete sentences. (2 points) part b: “person 8” does not want to see the disorder passed on to his offspring. he does, for certain, what to get married and have children biologically. if you were a genetic counselor, what advice would you give to him about his odds on having a child with the genetic disorder if he: (a) married a woman who is heterozygous for the condition and (b) married a woman who does not have the genetic disorder. (2 points)

answer///multiple alleles;

your answer is going to be physical weathering

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.