A monohybrid cross (F1xF1) would result in which of the following phenotypic ratios
a. 1:1
b. 2:1
c. 9:3:3:1
d. 1:2:1
e. 3:1
Answer: e. 3:1
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Answer the following statements true (T) or false (F)
1. The first bilateral animal emerged during the Ordovician Period. Fossils of this organism were discovered in South Africa. 2..The eukaryotic genome is comprised entirely of genes derived from Archean ancestors. 3. Although not well understood, the Cambrian Explosion most likely occurred due to changes in sea level and continental drift. 4. According to Thomas Malthus, food supplies tend to increase arithmetically while populations tend to increase exponentially, which means that populations will outgrow their food supply. 5. Selective breeding results from programs designed to modify traits in domesticated species.
A group of organisms of the same species that live together in the same place make up a(n) ____
a. population b. cell c. biosphere d. tissue e. ecosystem
The ____ is a bone of the lower leg in humans
a. femur b. tibia c. radius d. ulna e. humerus
All EXCEPT which of the following is true
about chlamydia? a. It is the most common bacterial STD. b. It can be passed on from mother to child. c. Most infected males are undiagnosed because they have no symptoms. d. It can be treated with antibiotics. e. Untreated males risk infertility