4. Which statements are useful for explaining the ratio of black-coated to brown-coated mice in the F2 generation?
Select all that apply.
a. The F, male produced two kinds of sperm, half carrying
an allele for black coat color, and half carrying an allele for
brown coat color.
b. The F, female produced two kinds of eggs, half carrying
an allele for black coat color, and half carrying an allele for
brown coat color.
c. An approximately three-to-one ratio of black to brown
coated mice in the F2 generation is accounted for by the
black allele being dominant over the brown allele.
d. The brown allele segregates together with the black
allele and disappears in the F, generation.

80 points pls brainliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?