BIOL 101 WEEK 4 QUESTIONS AND ANSWERS( COMPLETE SOLUTION RATED A)

BIOL 101 WEEK 4 QUESTIONS AND ANSWERS Question 1 (5 points) A karyotype . Question 1 options: of a normal human cell shows 48 chromosomes. is a photograph of cells undergoing mitosis during anaphase. cannot be used to identify individual chromosomes beyond the fact that two chromosomes are homologues. compares one set of chromosomes to another. Save Question 2 (5 points) Mitosis in humans usually results in the formation of . Question 2 options: 2 diploid cells A) 4 diploid cells B) 2 haploid cells C) 4 haploid cells D) E) Sperm or egg cells Save Question 3 (5 points) If the cell whose nuclear material is shown in Figure 12.2 continues toward completion of mitosis, which of the following events would occur next? Question 3 options: synthesis of chromatids nuclear envelope breakdown formation of telophase nuclei cell membrane synthesis spindle fiber formation Save Previous PageNext Page Question 4 (5 points) In humans, the number of tetrads formed during mitosis is . Question 4 options: 23 46 0 4 none of these Save Question 5 (5 points) What is a cleavage furrow? Question 5 options: A ring of vesicles forming a cell plate The separation of divided prokaryotes A groove in the plasma membrane between daughter nuclei The metaphase plate where chromosomes attach to the spindle The space that is created between two chromatids during anaphase Save Question 6 (5 points) If a cell has completed the first meiotic division and is just beginning meiosis II, which of the following is an appropriate description of its contents? Question 6 options: It is identical in content to another cell from the same meiosis. It has the same number of chromosomes but each of them has different alleles than another cell from the same meiosis. It has one-fourth the DNA and one-half the chromosomes as the originating cell. It has half the chromosomes but twice the DNA of the originating cell. It has half the amount of DNA as the cell that began meiosis. It is identical in content to another cell from the same meiosis. It has half the amount of DNA as the cell that began meiosis. It has half the chromosomes but twice the DNA of the originating cell. It has one-fourth the DNA and one-half the chromosomes as the originating cell. It has the same number of chromosomes but each of them has different alleles than another cell from the same meiosis. Save The statement is true for mitosis and meiosis I. The statement is true for meiosis I only. The statement is true for mitosis and meiosis II. The statement is true for mitosis only. The statement is true for meiosis II only. Save A) a haploid animal cell B) a diploid cell from a plant stem C) any diploid animal cell D) a plantlike protist E) an archaebacterium Question 10 (5 points) A cell is arrested during mitosis. At this stage, distinct chromatids are visible at opposite poles of the cell. Which stage of mitosis does this describe? Question 10 options: Metaphase Prophase Interphase Telophase Anaphase Save Question 11 (5 points) When the cell has just completed telophase, which of the following does he see? Question 11 options: A clear area in the center of the cell Chromosomes clustered at the poles Individual chromatids separating Formation of vesicles at the midline Two small cells with chromatin Save Question 12 (5 points) Four of the five answers listed below are related by a common phase of mitosis. Select the exception. Question 12 options: nucleolus reappears nuclear envelope re-forms chromosomes decondense chromosomes separate spindle microtubules disappear Save A) incomplete dominance B) multiple alleles C) pleiotropy D) epistasis E) independent assortment Save Question 14 options: A) 0% B) 25% C) 33% D) 50% E) 75% Save A) male hormones such as testosterone often alter the effects of mutations on the X chromosome. B) female hormones such as estrogen often compensate for the effects of mutations on the X chromosome. C) X chromosomes in males generally have more mutations than X chromosomes in females. D) males are hemizygous for the X chromosome. E) mutations on the Y chromosome often worsen the effects of X-linked mutations. Save Previous PageNextPagePage 5 of 7 Women can never have this condition. One-half of the daughters of an affected man could have this condition. One-fourth of the children of an affected father and a carrier mother could have this condition. Very rarely would a woman have this condition; the condition would be due to a chromosome error. Only if a woman is XXX could she have this condition. Save end up on the same gamete must be separated in order to function cannot cross over to the homologous chromosome during mitosis produce the same trait in every generation are the only genes associated with a specific site on the chromosome Save they have lost a region of a chromosome and the genes linked to it they have an abnormal number of chromosomes a section of one chromosome has translocated to another, nonhomologous chromosome they always display ambiguous genitalia they have a duplicated gene sequence on one of their chromosomes 4 9 5 3 2 Save inversion. deletion. translocation. aneuploidy. duplication. Show Less