MBG 2040 / MBG2040 QUIZ 3 ANSWERS

MBG 2040 / MBG2040 QUIZ 3 ANSWERS Question 1 0 / 1 point The separation of Sister Chromatids occurs in which of the following processes? i.Anaphase of Mitosis ii.Meiosis I iii.Meiosis II iv.Telophase I v.Telophase II vi.Anaphase I vii.Anaphase II None of the above i and iii iii only i, iii and vii ii only iii and v i, ii and vi Question 2 0 / 1 point One chromosome which has undergone duplication and consists of two sister chromatids is referred to as: A Univalent Homologous Chromosomes Sister Chromosomes A Bivalent Question 3 0 / 1 point Human gametes are said to be _ _ because they contain only one set (n) of chromosomes. Haploid Question 4 Diploid Uniploid Bivalent 0 / 1 point If an animal species normally has 24 chromosomes (2N=24) in each somatic cell, how many chromosomes would you expect to be in each daughter cell after a complete cycle of Mitosis? 12 6 48 24 Question 5 0 / 1 point Paired chromosomes containing the same array of genes, with one having been derived from the male parent and one having been derived from the female parent are called: Sister Chromatids Sister Chromosomes Homologous Chromosomes Bivalents Question 0 / 1 6 point A pair of physically associated homologous chromosomes that have undergone duplication to form a group of four chromatids present in metaphase I is referred to as: A Bivalent A Tetravalent Sister Chromatids Homologous Chromosomes Quiz 3: ML Question 7 0 / 1 point An autotriploid plant has 66 chromosomes (3N = 66). Which of the following could be observed in Meiosis I? 33 Bivalents 66 Bivalents 20 bivalents and 2 trivalent Quiz 3: Math 1 x Question 8 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=39) and T.militinae (N=9), producing mostly infertile hybrid progeny. Rarely one of these progeny is particularly large and also fertile . How many chromosomes would you expect to find in gametes of these fertile hybrids? Your Answer: (48) Question 9 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=10) and T.militinae (N=38), producing mostly infertile hybrid progeny. Rarely one of these progeny is particularly large and also fertile . How many bivalents would you expect to observe in Meiosis I of these fertile hybrids? Your Answer: (48) Quiz 3: Math 2x Question 10 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=21) and T.militinae (N=23), producing mostly infertile hybrid progeny. Rarely one of these progeny is particularly large and also fetrile. If one of these fertile hybrids was crossed back to a T.aestivum ho many chromosomes would you expect to find in the somatic cells of the plants produced by this second cross? Your Answer: (65) Question 1 0 / 1 point The duplication of chromosomes that occurs prior to cell division produces pairs of: Homologous Chromosomes Diploid Cells Haploid Cells Question 2 It is very common for plants to have more than two sets of chromosomes; ie. 3N, 4N. This is called: Diploid Polyploidy 0 / 1 point Aneuploidy Duplication Question 3 0 / 1 point The separation of homologous chromosomes occurs in anaphase of both Meiosis I and mitosis. False True Question 4 0 / 1 point Down Syndrome, Klinefelter Syndrome and Turner Syndrome are all examples of diseases arising from: Trisomy Hypoploidy Hyperploidy Aneuploidy (Aneuploidy is the presence of an abnormal number of chromosomes in a cell, for example a human cell having 45 or 47 chromosomes instead of the usual 46) Question 5 0 / 1 point When homologous chromosomes or sister chromatids fail to separate into separate daughter cells in either Meiosis I or II this is called: Non-disjunction A Mutation Aneuploidy Homologous Pairing Crossover Question 6 0 / 1 point An organism with an irregular number of chromosomes is said to be a/an: Allopolyploid Aneuploid Polyploid Diploid Quiz 3: ML Question 7 0 / 1 point An autotetraploid plant has 96 chromosomes, 4N= 96. Which of the following scenarios could be observed in Meiosis I? 32 Trivalents 24 Bivalents and 24 Univalents Quiz 3: Math 1 x Question 8 0 / 1 point” Two diploid (2N) species of wheat are crossed T.aestivuma (N=32) and T.militinae (N=38), producing an infertile hybrid plant. How many chromosomes would be found in the somatic cells of the hybrid? Your Answer: (70) Question 9 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N= 43) and T.militinae (N=3) producing a sterile hybrid. How many bivalents would you expect to observe in Meiosis I of T. militinae? Your Answer: Quiz 3: Math 2x Question 10 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=6) and T.militinae (N=45), producing mostly infertile hybrid progeny. Rarely one of these progeny is particularly large and also fetrile. If one of these fertile hybrids was crossed back to a T.militinae how many bivalents would you expect to observe in meiosis I within the sterile plants produced by this second cross? Your Answer: Meiosis II is similar to Mitosis in that in both processes involve the separation of sister chromatids during anaphase. Question 2 False 0 / 1 point A hypothetical animal species has 4 chromosomes in each somatic cell (2N = 4). The image above (far left) depicts a meiocyte from this species in metaphase I, with two sets of homologous chromosomes aligned along the equatorial plane. Which of the schematics on the right of this image is an accurate depiction of the daughter cells after Meiosis I is complete if there were a non-disjunction event in one chromosome during Meiosis I? A B C D Question 3 0 / 1 point The separation of homologous chromosome occurs in Anaphase of Meiosis II. True False Question 4 0 / 1 point Polyploidy can lead to sterility and seedlessness in plants due to the irregular pairing and separation of homologous chromosomes in: Meiosis II Meiosis I Question 5 Mitosis Fertilization 0 / 1 point A polyploid that is derived from the cross of two or more separate species is called a/an: Diploid Hyperploid Allopolyploid Autopolyploid Question 6 0 / 1 point Patua Syndrome is a chromosome abnormality disease caused by the presence of an extra copy of Chromosome 13. This is an example of: More than one answer is correct Trisomy Hypoploidy Aneuploidy Quiz 3: ML Question 7 0 / 1 point An autotetraploid plant has 72 chromosomes, 4N= 72. Which of the following scenarios could be observed in Meiosis I? 24 Trivalents 36 Bivalents 18 Bivalents and 24 Univalents 18 tetravalents Quiz 3: Math 1 x Question 8 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=4) and T.militinae (N=45), producing mostly infertile hybrid progeny. Rarely one of these progeny is particularly large and also fetrile. How many chromosomes would you expect to find in the somatic cells of these fertile hybrids? Your Answer: (98) Question 9 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=33) and T.militinae (N=37), producing an infertile hybrid plant. How many chromosomes would be found in the somatic cells of the hybrid? Your Answer: (70) Quiz 3: Math 2x Question 10 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=12) and T.militinae (N=34), producing mostly infertile hybrid progeny. Rarely one of these progeny is particularly large and also fetrile. If one of these fertile hybrids was crossed back to a T.militinae how many bivalents would you expect to observe in meiosis I within the sterile plants produced by this second cross? Your Answer: (34) Question 1 0 / 1 point While very rare among animal species polyploidy is quite common in insects such as bees, ants and wasps. False True Question 2 0 / 1 point Some species of insects including wasps and ants have males. Diploid Triploid Monoploid Question 3 Bivalent 0 / 1 point Many polyploid plants are sterile and therefore seedless due the irregular separation of sister chromatids in Meiosis II. True False Question 4 0 / 1 point A hypothetical animal species has 4 chromosomes in each somatic cell (2N = 4). The image above (far left) depicts a meiocyte from this species in metaphase of meiosis I, with two sets of homologous chromosomes aligned along the equatorial plane. Which of the schematics on the right of this image is an accurate depiction of the daughter cells after the completion of a normal Meiosis I? A B C D Question 5 0 / 1 point A cluster of 4 duplicated chromosomes (8 chromatids) that might be present during metaphase I in the meiotic cells of a species with 4 sets of homologous chromosome (4N) is called . Aneuploidy A tetravalent An octavalent This is not possible Question 6 0 / 1 point A polyploid that has multiple sets of the same chromosomes derived from the same species, often due to a duplication event is called a/an: Duplication Autopolyploid Diploid Allopolyploid Quiz 3: ML Question 7 0 / 1 point An autotetraploid has 48 chromosomes (4N=48). Which of the following could be observed in meiosis 1? Select all that apply. 12 tetravalents, 12 bivalents and 12 univalents 48 bivalents 12 tetravalents 24 bivalents Quiz 3: Math 1 x Question 8 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=21) and T.militinae (N=22), producing mostly infertile hybrid progeny. Rarely one of these progeny is particularly large and also fetrile. How many chromosomes would you expect to find in the somatic cells of these fertile hybrids? Your Answer: (86) Question 9 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=35) and T.militinae (N=19), producing mostly infertile hybrid progeny. Rarely one of these progeny is particularly large and also fertile . How many chromosomes would you expect to find in gametes of these fertile hybrids? Your Answer: (54) Quiz 3: Math 2x Question 10 0 / 1 point Two diploid (2N) species of wheat are crossed T.aestivuma (N=15) and T.militinae (N=43), producing mostly infertile hybrid progeny. Rarely one of these progeny is particularly large and also fetrile. If one of these fertile hybrids was crossed back to a T.aestivum how many chromosomes would you expect to find in the somatic cells of the plants produced by this second cross? Your Answer: (73)