BIOL-1033 Exam 4 Questions and Answers Already Passed

BIOL-1033 Exam 4 Questions and Answers Already Passed The human blood type AB, which displays both A and B antigens on red blood cells, is an instance of what genetic concept? - A) Incomplete dominance - B) Codominance - C) Dominant recessive - D) Epistasis - Explanation: Codominance What term describes a gene located on the X chromosome? - A) Autosomal gene - B) X-linked gene - C) Y-linked gene - D) Mitochondrial gene - Explanation: A gene on the X chromosome 2 If both parents are carriers of the recessive cystic fibrosis allele, what is the likelihood that their child will inherit the disease? - A) 50% - B) 75% - C) 25% - D) 0% - Explanation: 25% When a red-flowered plant is crossed with a white-flowered plant, all offspring have pink flowers. What type of dominance does this illustrate? - A) Codominance - B) Complete dominance - C) Incomplete dominance - D) Epistasis - Explanation: Incompletely dominant What theory explains the origin of mitochondria in eukaryotic cells? - A) Panspermia - B) Endosymbiosis 3 - C) Abiogenesis - D) Evolution - Explanation: Endosymbiosis of an aerobic bacterium Which organism is most likely to leave behind fossils? - A) A soft-bodied jellyfish - B) A thick-shelled crustacean - C) A delicate butterfly - D) A small bird - Explanation: A common thick-shelled crustacean If you discover a fossil estimated to be around 100 million years old, which radioisotope would you avoid for dating it? - A) Potassium-40 - B) Uranium-238 - C) Carbon-14 - D) Rubidium-87 - Explanation: Carbon-14/Nitrogen-14