In Holstein cattle the allele for black hair color (B) is dominant over the allele for red hair color (b), and the allele for polled (P), or lacking horns, is dominant over the allele for having horns (p).
What is the expected phenotypic ratio of the offspring of a BbPp x BbPp cross if these alleles sort independently?
• A 16 black/polled : O black/horned : 0 red/polled : O red/horned
OB. 12 black/polled : O black/horned: 0 red/polled : 4 red/horned
O C. 4 black/polled : 4 black/hogned : 4 red/polled : 4 red/horned
OD. 9 black/polled : 3 black/horned : 3 red/polled : 1 red/horned

Competition occurs between species when

Read this summary of a scientific theory: "cells are the most basic structural and functional units of life. all living organisms are made up of one or more cells. all cells that are alive in the world today came from pre-existing cells." which of the following would require this theory to be modified? -a.) a survey finds that a majority of people believe viruses carry out the basic processes of life. -b.) a prominent scientist says she feels strongly that one day the theory will be challenged by life on other planets. -c.) the dna of unicellular and multi-cellular organisms is shown to have many fundamental similarities. -d.) scientific observations show that microscopic organisms living in the deep ocean are not made up of cells.

The disease osteoporosis often results from insufficient intake of dietary calcium salts. of the three samples of bone you tested in exercise 7-2, which is the most similar to the bones in osteoporosis