Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Today you learned about the structure of chromosomes and some of the conditions that arise in humans from chromosomal abnormalities. Why do you think this lesson directly precedes a lesson on mitosis and the cell cycle (about how cells duplicate)? Explain your reasoning using at least TWO facts/characteristics of chromosomes and information about at least ONE chromosomal disorder from today's lesson.
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- A human protein, MC1R is responsible for telling human cells what type of pigment proteins to produce. One version of MC1R causes cells to make red pigments, while another version causes our cells to make black pigments. The red version causes red hair. The black version causes black hair. The two versions are called O homozygous and heterozygous homologous chromosomes alleles sister chromatidsarrow_forwardUse the following information as the basis for answering all questions: A diploid eukaryotic organism has 4 unique chromosomes. Chromosome I is metacentric, chromosome II is telocentric, chromosome III is a submetacentric, and chromosome IV is acrocentric. 16. How many total chromosomes are in a germ cell in the ovary of this organism that is in Metaphase of Meiosis I? 17. How many total chromatids are in a germ cell in the ovary of this organism that is in Metaphase of Meiosis I? 18. How many total telomeres are in a germ cell in the ovary of this organism that is in Metaphase of Meiosis I?19. How many total chromosomes are in a germ cell in the ovary of this organism that is in Anaphase of Meiosis I? 20. How many total chromatids are in a germ cell in the ovary of this organism that is in Anaphase of Meiosis I? 21. How many total telomeres are in a germ cell in the ovary of this organism that is in Anaphase of Meiosis I?arrow_forwardThink about the important functions of telomeres. Now, imagine a scenario in which a mutant eukaryotic cell DID NOT have such specialized telomeric regions present on its chromosomes. List three major CONSEQUENCES of the lack of telomeres, based upon what you know about their normal functions. Please clearly list 3 consequencesarrow_forward
- 17 Homologous chromosomes can be found in cells that have completed mitosis. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a TRUE FALSEarrow_forwardA dog has78 chromosomes . How many chromosomes will a cell have after it goes through mitosis? And how many chromosomes will dog have after going through meiosis?arrow_forwardThe dog Canis familiaris is a diploid organism with 39 pairs of homologous chromosomes. For the dog, how many chromosomes and chromatids are present in one nucleus at each of the following stages of the cell cycle? i. A somatic cell before replication ii. A somatic cell after replication iii. A somatic cell in Prophase of mitosis iv. One product of Telophase of mitosis v. A meiocyte in Prophase I of meiosis vi. A meiocyte in Prophase II of meiosis vii. One product of telophase II of meiosisarrow_forward
- . A mature female wolf, with 78 diploid chromosomes in each somatic cell, produces haploid oocytes (egg cells) containing how many chromosomes per cell? 1 sex-determining chromosome (Y) and 38 autosomes 2 sex-determining chromosomes (XX) and 76 autosomes 1 sex-determining chromosome (X) and 39 autosomes 2 sex-determining chromosomes (XY) and 76 autosomes 1 sex-determining chromosome (X) and 38 autosomesarrow_forwardIn which stage(s) of the cell cycle, mitosis or meiosis do each of these processes occur (multiple stages apply to some) Crossing-over: Chromosome supercoiling: Separation of sister chromatids: DNA synthesis: Chromosome reduction from 2N to N: 4. A previously undiscovered single celled organism was found living at a great depth on the ocean floor. Its nucleus contains only a single, linear chromosome consisting of 7x10^6 nucleotide pairs of DNA coalesced with three types of histone-like proteins. The analysis of individual nucleosomes revealed that each unit contained one copy of each protein and that the short linker DNA had no protein bound to it If the entire chromosome consists of nucleosomes (discounting any linker DNA), how many are there and how many total proteins are needed to form them?arrow_forward1) Compare and Contrast Number of chromosomal duplications Number of cell divisions Number of daughter cells produced Number of chromosomes in daughter cells How chromosomes line up during metaphase Genetic relationship of daughter cells to parent cell Functions performed in the human body Mitosis Meiosisarrow_forward
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