The following image is a pedigree for a family with the genes for cystic fibrosis, which is an autosomal recessive trait. If the dominant allele is represented by A and the recessive allele is represented by a, what would be a possible genotype and phenotype of individual II.3? A. Genotype: AA Phenotype: unaffected B. Genotype: AA Phenotype: carrier C. Genotype: Aa Phenotype: affected D. Genotype: aa Phenotype: unaffected

How does the molecular clock work? a. it analyzes the brain functionality of two different species. b. it examines and compares the physical characteristics of two different species. c. it illustrates relationships between two different species. d. it compares the number of mutations that exist in the dna of two different species.

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.