This Pedigree shows the inheritance pattern of hitchhiker’s thumb in a family. A hitchhiker’s thumb is a thumb that can move backward beyond the normal range of motion. Which choice most likely represents Jill’s genotype for the hitchhiker’s thumb trait?
A.
HH

B.
hH

C.
hh

D.
Hhh

Each trait of a plant is determined a. an allele b. one gene c. a pair of genes d. one dominant gene

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.

Some scientists argue that global warming is related to buming fossil fuels to produce energy o increased use of fertilizers loss of forested areas a of the above