Male peacocks have tail feathers that make up about 60% of their body length. during the mating season they contract muscles to shake these feathers in front of females; females evaluate the feather rustling as part of selecting their mate. the is the mechanistic cause of this behavior; the is the adaptive function of this behavior.

Select the correct answer. tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d