Aphenotypically normal woman is heterozygous for the recessive mendelian allele causing phenylketonuria, a disease caused by the inability to process phenylalanine in food. she is also heterozygous for a recessive x-linked allele causing red–green colorblindness. what percentage of her eggs will carry the dominant allele that allows normal processing of phenylalanine and the x-linked recessive allele that causes colorblindness?
a) 0%
b) 25%
c) 50%
d) 75%
e) 100%

What type of cell is produced after fertilization occurs and the gametes combines ?

List two limitations of natural selection

20 point pls brianliest 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?