In dogs, wire hair is dominant to smooth hair. Two parents of unknown genotypes produce a litter of 10 puppies: 5 smooth-haired,
and 5 wire-haired. What is the most likely genotype combination of
the parents? Use a Punnett square to confirm.
Select one:
O
Both parents were homozygous smooth-haired.
O
Both parents were heterozygous wire-haired.
Both parents were homozygous wire-haired.
O
One parent was heterozygous for wire hair the other was homozygous for
smooth hair.

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.