A diploid fruit fly has eight chromosomes. How many total chromosomeswould be found in the following flies?A. TetraploidB. Trisomy 2C. Monosomy 3D. 3nE. 4n + 1
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A diploid fruit fly has eight chromosomes. How many total chromosomes
would be found in the following flies?
A. Tetraploid
B. Trisomy 2
C. Monosomy 3
D. 3n
E. 4n + 1
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- When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation includedboth red- and white-eyed flies. Remarkably, all the white-eyed flies were male. What was the explanation forthis result? a. The gene involved is on the X chromosomeb. The gene involved is on the Y chromosomec. The gene involved is on an autosome, but only in malesd. Other male-specific factors influence eye color in fruit fliese. None of these is correctA diploid fruit fly has 8 chromosomes. Which of the following terms should not be used to describe a fruit fly with four sets of chromosomes?A. Polyploid B. Aneuploid C. Euploid D. Tetraploid E. 4nA diploid fruit fly has eight chromosomes. Which of the followingterms should not be used to describe a fruit fly with four sets ofchromosomes?A. PolyploidB. AneuploidC. EuploidD. TetraploidE. 4n
- Construct a table similar to that in Figure 2.12 for the different stages of meiosis, giving the number of chromosomes per cell and the number of DNA molecules per cell for a cell that begins with 4 chromosomes (two homologous pairs) in G1. Include the following stages in your table: G1, S, G2, prophase I, metaphase I, anaphase I, telophase I (after cytokinesis), prophase II, metaphase II, anaphase II, and telophase II (after cytokinesis).Draw a diagram of meiosis in a cell where 2n = 6, in a case where there is interchromosomal mixing. Use a clearly labelled colour code (what does each colour represent?) to represent the chromosomes.If a diploid organism has 14 chromosomes (2n=14) a. How many chromosomes will its gametes have? b. After meiosis I during gamete formation, how many chromosomes are in each daughter cell? c. After meiosis I during gamete formation, how many chromatids are in each daughter cell?
- A diploid fruitfy has 8 chromosomes. How many total chromosomes would be found in a monoploid fly?How do telophase I and telophase II differ during meiosis in animal cells? a. Cells remain diploid at the end of telophase I, but are haploid at the end of telophase II. b. Daughter cells form a cell plate to divide during telophase I, but divide by cytokinesis during telophase II. c. Cells enter interphase after telophase I, but not after telophase II. d. Chromosomes can remain condensed at the end of telophase I, but decondense after telophase II.Consider a diploid cell that has 2n = 4 chromosomes: one pair of metacentric chromosomes and one pair of acrocentric chromosomes. Suppose that this cell undergoes nondisjunction, giving rise to an autotriploid cell (3n). The triploid cell then undergoes meiosis. Draw the different types of gametes that could result from meiosis in the triploid cell, showing the chromosomes present in each type. To distinguish between the different metacentric and acrocentric chromosomes, use a different color to draw each metacentric chromosome; similarly, use a different color to draw each acrocentric chromosome.
- Which of the following terms should not be used to describe ahuman with three copies of chromosome 12?A. PolyploidB. TriploidC. AneuploidD. EuploidE. 2n + 1F. Trisomy 12In a diploid organism that has a haploid complement of n=10, what is the formula and chromosome compliment of each individual? Chromosome complement Formula Total number of chromosomes 1. Trisomy 2. Monosomy 3. Tetraploid 4. TriploidWhen does crossing over usually occur, and what is the endresult?a. It occurs during prophase of meiosis I, and the end result isthe exchange of pieces between homologouschromosomes.b. It occurs during prometaphase of meiosis I, and the endresult is the exchange of pieces between homologouschromosomes.c. It occurs during prophase of meiosis I, and the end result isthe separation of sister chromatids.d. It occurs during prometaphase of meiosis I, and the endresult is the separation of sister chromatids.