Guinea pigs, the allele for black fur (B) is dominant. The allele for white fur (b) is recessive. Two guinea pigs were crossed. Which of these describes the phenotypes of the parent guinea pigs? Both parents have black fur.
Both parents have white fur.
One parent has black fur and one parent has white fur.
Each parent has black and white fur.

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement