In order to unravel the mysteries of human genetics scientists have studied the genetics of many other organisms. One organism that has taught us a lot is the fruit fly. Fruit flies (Drosophila melanogaster) reproduce sexually. Sex cells from both parents, each containing four chromosomes are combined to create a single-celled zygote with eight chromosomes. That cell undergoes mitotic cell division to create identical copies of itself. These cells differentiate into specialized cells. Knowing that the cells in the eyes have the same DNA as the cells that make up the body of the fruit fly, questions were asked to clarify the role of DNA and chromosomes in coding the instructions for traits passed from parents to offspring. 2. Which of these questions is NOT scientifically testable? O Do eye cells and the cells that make up the body make the same proteins? O Does all DNA in a cell code for protein? O What makes eye cells different from the cells that make up the body? O Should scientists study fruit flies to determine how DNA codes for traits? < Previous

In order to unravel the mysteries of human genetics scientists have studied the genetics of many other organisms. One organism that has taught us a lot is the fruit fly. Fruit flies (Drosophila melanogaster) reproduce sexually. Sex cells from both parents, each containing four chromosomes are combined to create a single-celled zygote with eight chromosomes. That cell undergoes mitotic cell division to create identical copies of itself. These cells differentiate into specialized cells. Knowing that the cells in the eyes have the same DNA as the cells that make up the body of the fruit fly, questions were asked to clarify the role of DNA and chromosomes in coding the instructions for traits passed from parents to offspring. 2. Which of these questions is NOT scientifically testable? O Do eye cells and the cells that make up the body make the same proteins? O Does all DNA in a cell code for protein? O What makes eye cells different from the cells that make up the body? O Should scientists study fruit flies to determine how DNA codes for traits? < Previous

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Description: Which of these questions is not scientifically testable and why? In order to unravel the mysteries of human genetics scientists have studied the genetics of many otherorganisms. One organism that has taught us a lot is the fruit fly. Fruit flies (Dro

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter8: How Cells Reproduce

Section: Chapter Questions

Problem 2.1DID

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Human somatic cells have 46 chromosomes. How many chromosomes are present in human cells undergoing each of the following phases of meiosis? Interphase - Answer: 0 2 3 4 6 9 2 Prophase I - Answer: 0 2 3 4 6 9 2 Prophase II - Answer: 0 2 3 4 6 9 2 Telophase I - Answer: 0 2 3 4 6 9 2 Telophase II - Answer: 0 2 3 4 6 9 2
Your class has been studying cell division in a number of organisms with different chromosome numbers. Unfortunately, the slides showing the different stages of mitosis and meiosis got mixed up, and some of them got lost. The figures below show the 12 slides that you have managed to find. The organism that you have been studying has a 2n number of 8 with one pair of large metacentric chromosomes, one pair of small metacentric chromosomes, one pair of acrocentric chromosomes and one pair of telocentric chromosomes. a. Do any of the recovered slides below show the stages of cell division indicated in the table in the answer sheet? If so, please write only the slide number in the correct place in the table on your answer sheet.
A typical somatic cell from a badger, which is a diploid, sexually reproducing animal, contains a total of 32 chromosomes. Gametogenesis in badgers is similar to humans. What is the genome size for the badger in terms of chromosome number? How many DNA molecules would be found in a secondary oocyte before dividing? How many chromosomes would be found in a cell at metaphase? How many DNA molecules should be in a tetraploid liver cell from the badger?
Human cells normally have 46 chromosomes. For each of the following stages, state the number of chromosomes present in a human cell: 1. Metaphase of mitosis 2. Metaphase I of meiosis 3. Telophase of mitosis 4. Telophase I of meiosis Telophase II of meiosis
One reason that worker bees forgo their own reproduction to help their sister (the queen) reproduce is that female bees are more closely related to their sisters than they are to their own offspring. This quirk of genetics results from the fact that bees have haplodiploid sex determination, in which females are diploid, with a mother and a father, but males are haploid, developing from unfertilized eggs. Because males are haploid, they produce sperm by mitosis. Explainwhy haplodiploid sex determination causes females to be more closely related to their sisters than to their offspring.
Which of the following statements correctly describes the process of mitosis in a diploid cell?Note: a complete set of chromosomes refers to one of each kind of chromosome. A complete set of homologous chromosomes refers to two of each kind of chromosome - one from the mother and one from the father) Select one: a. A complete set of homologous chromosomes are divided into each daughter cell so that each new cell gets one set of chromosomes. b. Cytoplasm and its organelles are equally divided into each daughter cell. c. A complete set of homologous chromosomes are equally divided into each reproductive cell. d. DNA and cytoplasm are equally divided into each daughter cell.
A somatic cell has the genotype DdEe. All chromosomes in this organism are metacentric. Show metaphase and the results of mitosis if the D and E locus are linked on the same chromosome in trans configuration. A sexually reproducing organism has the following phenotype DdEeAaTt: The D and E loci are on the same arm of a metacentric chromosome in cis configuration. The A locus is on the long arm of an acrocentric chromosome and the T locus is on a telocentric chromosome. 2.1. What is the haploid number of this organism? 2.2. Using diagrams show a ceii at metaphase of mitosis and show the results of mitosis.
Rainbow trout go through a unique genetic reproductive process. Female eggs are diploid, while male sperm are haploid. In the wild, when the sperm fertilizes an egg, the extra set of chromosomes is eliminated, resulting in a diploid offspring.The process that produces the sperm and egg, and the process the offspring use to grow into adults are, respectively, Select one: a. Process to produce sperm and egg Process used for growth of the offspring Mitosis Cytokinesis b. Process to produce sperm and egg Process used for growth of the offspring Mitosis Meiosis c. Process to produce sperm and egg Process used for growth of the offspring Meiosis Cytokinesis d. Process to produce sperm and egg Process used for growth of the offspring Meiosis Mitosis
In dolphins, 2n=44. Drag each term or phrase to the correct position. (Each box is used once.) Somatic cell in anaphase of mitosis Ovum Somatic cell during interphase Zygote Sperm Cells with 22 chromosomes Cells with 44 chromosomes Cells with 88 chromosomes
The following four questions refer to the picture below: 1) In meiosis, the homologous chromosomes are side by side. Are they side by side in mitosis? 2)In meiosis, each centromere has a spindle fiber attached only to one side. In mitosis, each centromere has a spindle attached to how many sides? 3) Look at what happened right after Metaphase in both processes. In mitosis, what has been separated homologous chromosomes or sister chromatids? 4) After Metaphase I in meiosis, what has been separated, homologous chromosomes or sister chromatids?
Mitosis produces 2 daughter cells that are identical to the starting cell. Explain how meíosis is different using this diagram to help you. 1) How many cells are created through meiosis? 2) Describe the chromosomes in each gamete at the end of meiosis? Are the set of chromosomes in a gamete identical to the starting cell like they are in mitosis? Are there the same number of chromosomes in each gamete as the starting cell? Starting cell's chromosomes: 1А, 1B, 2A, 2B Interphase After the S phase of interphase: 4 pairs of sister chromatids 1A 1A 1B 1B 2A 2A 2B 2B Meiosis has 2 rounds of cell division 1A, 1A, 1B, 1B, 2A 2B 2A 2B tv MacBook Air DII DD 80 888 F9 F10 F6 F7 F8 F4 F3 * #3 2$ % & 8 9 3 4 E T. Y F G J K * CO R
A sexually reproducing organism has the following phenotype DdEeAaTt. The D and E loci are on the same arm of a metacentric chromosome in the cis configuration. The A locus is on the long arm of an acrocentric chromosome and the T locus is on a telocentric chromosome. There are no other chromosomes. Show a diagram of the cell in metaphase of mitosis and the result of mitosis.