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Question 1 of 31 3.0 Points What is the major difference during cytokinesis in eukaryotes with or without a cell wall? A. cell plate in those without cell walls B. cleavage furrow in those without cell walls C. cytokinesis does not occur in cells without a cell wall D. cytokinesis does not occur in cells with a cell wall Feedback: The cell wall means that cell division occurs with an additional structure, resulting from vesicles fusing on the cell wall. Review the cell cycle in Chapter 6. Question 2 of 31 3.0 Points During which stage in interphase does DNA synthesis occur? A. S phase
B. G2 phase C. G1 phase D. Mitosis Feedback: Great job. Question 3 of 31 3.0 Points What is the phase that not all cells enter, but is a phase where cells are not actively dividing? A. G B. S C. G
3.0 Points What are oncogenes? A. normal cells that are visible on an X-ray B. genes that cause a cell to become cancerous C. cells that cause a mass without negative effects D. genes that are responsible for hair loss Feedback: Great job. Question 6 of 31 3.0 Points What is the purpose of checkpoints in the cell cycle? A. to keep any foreign DNA out of the cell
B. to maintain protein health in the cell C. to ensure detrimental mutations are not passed on D. to make the division move faster Feedback: Great job. Part 2 of 8 - Chapter 7 18.0 Points Question 7 of 31 3.0 Points In which phase of meiosis does crossing over between homologous chromosomes occur? A. meiosis I B. cytokinesis C. interphase
A. aneuploid B. autosome C. polyploid D. euploid Feedback: Great job. Question 10 of 31 3.0 Points DNA synthesis occurs during: A. S phase of interphase of meiosis and mitosis B. S phase of interphase of mitosis only
C. between meiosis I and meiosis II D. S phase of interphase of meiosis only Feedback: Great job. Question 11 of 31 3.0 Points What is NOT a benefit of asexual reproduction compared to sexual reproduction? A. all members of the population can reproduce themselves B. The offspring will be as successful in the habitat as the parent. C. The only source of variation in the next generation is mutation. D. They do not require another organism of the opposite sex.
B. when in a heterozygote, expression of two contrasting alleles such that the individual displays an intermediate phenotype C. a phenomenon in which alleles that are located in close proximity to each other on the same chromosome are more likely to be inherited together D. in a heterozygote, one trait will conceal the presence of another trait for the same characteristic Feedback: Great job. Question 14 of 31 3.0 Points In a cross between two heterozygous (Aa) individuals, what is the likely percentage of the offspring that will be homozygous dominant (AA)? A. 75% B. 25%
C. 50%
D. 100%
Feedback: Great job. Question 15 of 31 3.0 Points What is the genetic make-up of an organism is described as? A. phenotype B. genotype C. alleles D. zygotes
B. 50%
C. 100%
D. 0%
Feedback: Great job. Question 18 of 31 3.0 Points In humans, females that are heterozygous for a sex-linked disease will on average pass the trait onto what percentage of her male offspring? A. 0% B. 100% C. 25%
D. 50%
Feedback: Great job. Part 4 of 8 - Lecture Material 9.0 Points Question 19 of 31 3.0 Points What is the central dogma of molecular biology? A. DNA is read by RNA, which is then read and proteins are produced B. RNA initiates DNA replication, which controls all aspects of life C. Proteins cycle through the cell, ending in RNA coiling D. Proteins can reproduce unassisted Feedback: Great job! Question 20 of 31 3.0 Points
C. The majority of traits are recessive, so do not change often. D. All diseases are the result of mutations. Feedback: Great job! Part 5 of 8 - Part 3: Lab Lecture Material 9.0 Points Question 22 of 31 3.0 Points What is the importance of a large sample size in an experiment? A. it increases the statistical power B. it results in a larger margin of error C. it decreases the amount of variation
D. it makes it easier to find participants Feedback: Correct! A larger sample size means that the results are more reliable due to fewer outliers as well as the ability to gather data and mathematical facts. Question 23 of 31 3.0 Points Why is randomization important in an experimental design? A. to reduce bias in the experiment B. to shorten the time it takes for the experiment C. to increase the number of sample units D. to make it easier for the researcher to find participants Feedback: Correct! Randomization is important so that researchers remove their prejudice with respect to the results. Question 24 of 31 3.0 Points Which of the following is NOT a reason why Wakefield’s study on the connection between autism and vaccinations was flawed?
There were many errors in Wakefield’s study on autism, but considering everyone’s health was not one of them. Review the Anti-vaccine movement in the Lab Lesson Content. Part 6 of 8 - Lab Material 15.0 Points Question 25 of 31 3.0 Points How many years separation does each layer in this fossilized stickleback lab represent? A. 1 billion B. 10, C. 3, D. 1 million Feedback: Review Lab 4: Stickleback Evolution, Part 2 Question 26 of 31 3.0 Points Why did we use a line graph for the data in this experiment?
A. They are used to represent continuous data B. You can compare one point in time C. It is the only type where time can be added D. They have an X and Y axis Feedback: Great. Question 27 of 31 3.0 Points What score would you assign to a fossil specimen that has only one pelvic spine visible? A. absent B. semi-absent
