week 13 quiz Flashcards
According to the article “His Fertility Advance Draws Ire: Shoukhrat Mitalipov’s Mitochondrial Manipulations”, by Sabrina Travernise,”, when using Dr. Mitalipov’s technique, where do the healthy mitochondria come from?
A. The biological father
B. The biological mother
C. A woman who is not genetically related to the biological father or mother
D. A man who is not genetically related to the biological father or mother
E. A gorilla
C
What is the ploidy of organisms that have two sets of chromosomes?
A. n B. 2n C. 3n D. 4n E. none of the above
B
If a cell has 16 chromosomes, how many chromosomes would each of its two daughter cells have after meiosis I?
A. 4 B. 8 C. 16 D. 32 E. 2
B
In humans, it has been estimated that approximately _____ percent of fertilized eggs fail to develop into viable organisms.
A. 0.01% B. 0.1% C. 1 % D. 50% E. 90%
D
At the end of _____ and cytokinesis, haploid cells contain chromosomes that each consist of two sister chromatids.
A. telophase I B. interphase C. anaphase II D. telophase E. telophase II
A
According to the article “His Fertility Advance Draws Ire: Shoukhrat Mitalipov’s Mitochondrial Manipulations”, by Sabrina Travernise, what does Marcy Darnovsky, executive director of the Center for Genetics and Society, have to say about the technique of mitochondrial replacement?
A. It is an important clinical advance that should be made available to the population at large.
B. It has the potential to lead to a significant number of birth defects
C. She is worried that these techniques might be used to engineer children with specific character traits in the future.
D. She believes that Dr. Mitalipov should be imprisoned
E. She believes it deserves to be awarded a Nobel Prize
C
Crossing over of chromosomes is associated with what structure?
A. centromere B. centrosome C. synaptonemal complex D. microtubules E. microfilaments
C
What is the haploid number for an octoploid organism that has 24 chromosomes?
A. 1 B. 2 C. 3 D. 4 E. 6
C
The protein called p53 is involved in
A. initiating mitosis B. initiating the S phase of the cell cycle C. initiating the S-G2 transition D. checking for damaged DNA E. terminating the action of MPF
D
How is mitochondrial DNA is usually inherited?
A. From the mother B. From the father C. From the grandfather D. It is random chance E. Scientists don't know yet
A
Of the germ layers comprising the early human embryo, which one forms most of the central nervous system?
A. Endoderm B. Mesoderm C. Ectoderm D. Notochord E. Gastroderm
C
Crossing over occurs during
A. Prophase II of Meiosis II B. Metaphase II of Meiosis II C. Telophase II of Meiosis II D. Prophase I of Meiosis I E. Metaphase of Meiosis I
D
As a cell undergoing meiosis moves from cytokinesis after telophase I, to telophase II,
A. The number of chromosomes in the daughter cells will be cut in half
B. The number of chromosomes in the daughter cells will remain the same
C. The number of chromosomes in the daughter cells will increase by 2
D. The cell will move from the diploid phase to the haploid phase
E. The cell will move from the haploid phase to the diploid phase
B
Which event makes meiosis a reduction division and why?
A. separation of sister chromatids in meiosis I because it reduces the number of chromatids per chromosome
B. separation of sister chromatids in meiosis II because it reduces the number of chromatids per chromosome
C. separation of homologs in meiosis I because it produces 2 haploid (n) daughter cells from a single diploid (2n) parent cell
D. separation of homologs in meiosis II because it produces 2 haploid (n) daughter cells from a single diploid (2n) parent cell
E. separation of sister chromatids in metaphase I because it reduces the number of chromatids per chromosome
C
Down’s syndrome results from
A. Non-disjunction B. Independent assortment C. Sex linked disease D. Mendel’s law of segregation E. All of the above
A
