Embryonic development begins with a single egg fertilized by a single sperm forming a zygote. The
zygote then undergoes mitosis; how many cells would be present at the conclusion of 4 mitotic
divisions?
a. 2
b. 4
c. 8
d. 16
e. 32
D
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How many net ATP and NADH molecules are produced from one molecule of glucose during glycolysis?
A. 2 ATP, 2 NADH B. 2 ATP, 6 NADH C. 4 ATP, 2 NADH D. 3 ATP, 4 NADH E. 0 ATP, 6 NADH
All isotopes of an element have a different number of ____
a. electrons b. protons c. neutrons d. orbital shells e. atoms
In the familial form of retinoblastoma, individuals who inherit one mutant allele of the RB1 gene have an 85% chance
of developing retinoblastoma and other cancers. Explain why, when these individuals carry only one copy of the mutant gene, there is such a high incidence of cancer in these RB1 heterozygotes. What will be an ideal response?
What characteristic of a species refers to having two of each type of chromosome?
A. Autosomal B. Karyotype C. Diploid D. Base-paired E. Helical