What does the notation Rr mean to geneticists?

heterozygous alleles (My guess)

homozygous alleles

dominant alleles

recessive alleles

What is a mineral that is toxic to sheep

Which two characteristics of living things do viruses exhibit?

Which of these types of rock can be weathered to form sediment? select

Sources of the heat inside earth?

Which cell type does not belong in this group? a. erythrocyte b. lymphocyte c. monocyte d. eosinophil

Know the three layers of earth, what they're made of and their temperatures

Lemon trees receiving the most water produced the most lemons Identify the independent and dependent variable

A person who is genetically predisposed to be obese cannot improve his or her overall health through moderate lifestyle changes.

Which of the following is a reason conflicts over zoning decisions can become a divisive issue? a. Zoning decisions are often wrong and result in significant financial hardship for a city. b.

The Manx mutation, which produces no tail in cats, is a recessive lethal. What phenotype ratios would be expected from a cross between two Manx cats? A. ¾ Manx: ¼ normalB. ¾ normal: ¼ ManxC. ⅔ Manx : ⅓ normalD. All Manx