Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
6th Edition
ISBN: 9780134555430
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 8, Problem 3LTB
Summary Introduction
Introduction:
A gene is the basic functional unit for heredity. Genes are composed of the DNA strands and are located on the chromosomes. Genes are instructions to make the protein by the process of transcription and translation. The location where the gene is placed in the chromosome is termed as the locus of that gene.
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A prairie grass species called "little bluestem" is tetraploid. It has four complete sets of chromosomes. There are ten kinds of chromosomes; in other words, each complete set of chromosomes has a total of 10 chromosomes. A single somatic cell (e.g., a cell in a leaf) will have 40 chromosomes, 4 of each kind of chromsome, i.e., 4 of the number 1 chromsome, 4 of the number 2 chromsome, etc. The illustration below shows prophase of meiosis 1 in chromosome number 10. In a diploid cell, there would be one tetrad (group of 4 chromatids) for each kind of chromosome. For example, there would be one tetrad for chromosome 8, one for chromsome 9, etc. When the tetraploid little bluestem undergoes meiosis, how many of chromosome number 10 will each sperm cell carry?
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Chapter 8 Solutions
Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
Ch. 8 - What is the relationship between genotype and...Ch. 8 - Add labels to the figure that follows, which...Ch. 8 - Prob. 3LTBCh. 8 - Prob. 4LTBCh. 8 - Prob. 5LTBCh. 8 - Scientists have recently developed a process by...Ch. 8 - What is the physical basis for the independent...Ch. 8 - Prob. 8LTBCh. 8 - Prob. 9LTBCh. 8 - Prob. 10LTB
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- Chromosomes pass genetic information from one cell to another in cell generation. (j) Explain the relationship between DNA, genes, and chromosomes during the passing of genetic information. (k) During the passing of genetic information from one generation to the next via chromosomes, nondisjunction can occur, interrupting the process. Describe the events that take place during nondisjunction.arrow_forwardWhich of the following statement is correct about chromosome? options: Chromosomes are present as pairs of homologous chromosomes Chromosomes are divided equally between the two daughter cells during cell division Chromosomes are doubled prior to cell division All of the abovearrow_forwardAll of the following are distinctions between the process of mitosis and meiosis EXCEPT: Group of answer choices homologous chromosomes in meiotic cells conduct synapsis meiotic cells produce genetically distinctive cells meiotic cells go through two cell divisions meiotic cells have homologous chromosomes where mitotic cells do not 2. All of these mechanisms ensures that DNA replication is accurate EXCEPT: Group of answer choices DNA splicing by spliceosomes excision repair mismatch repair complementary base pairingarrow_forward
- In 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_forwardWhich one of the following entries does not describe the relationship between homologous chromosomes? Contain the same genes, but may be different alleles Contain identical alleles of the same genes Inherit one homologous chromosome from mother, inherit one homologous chromosome from father. Very similar at the DNA sequence levelarrow_forwardWhich of the following processes leads to aneuploidy, the condition of having too many or too few copies of a particular chromosome? Select all that apply. Nondisjunction of chromosomes during mitosis Nondisjunction of chromosomes during meiosis Proper separation of chromosomes during mitosis Proper separation of chromosomes during meiosisarrow_forward
- The following is the diagram of a pair of chromosomes. Identify a gene locus, a pair of alleles, and three pairs of genes.arrow_forwardDifferent cells in your body (like muscle cells and brain cells) look very different and do very different jobs in your body. Select all the true statements about these cells: The nuclei of muscle cells and brain cells contain identical chromosomes to each other. Muscle cells have different chromosomes than brain cells. Muscle cells and brain cells have the same genes on their chromosomes muscle cells and brain cells have different genes on their chromosomes Muscle and brain cells express (use) every gene found on their chromosomes Muscle cells and brain cells express (use) all the same genes as each other Muscle cells and brain cells express (use) different genes from each other tv MacBook Air 80 888 FB F7 F4 F3 & # $ % 9 5 6 8 3 4 P Y U E K F G C V command ...- Rarrow_forwardArrange the events in chronological order for the physical process of meiotic recombination. Prophase I of meiosis begins. Recombination is complete. Homologous chromosomes pair together. Enzymes break both strands of DNA in one chromosome. The 3' overhang strand of DNA invades the double helix of the homologous chromosome. Enzymes resolve the Holliday junction. The duplexed strand of DNA serves as a primer for synthesis of new DNA. Enzymes degrade the 5' strands of DNA.arrow_forward
- Which of the following correctly describes the changes in chromosome structure? Deletion: a piece of a chromosome is inveted Inversion: a part of one chromosome becomes attached to another chromosome Translocation: part of a chromosome is copied Translocation: part of one chromosome becomes attached to another chromosome Duplication: a complete chromosome is copiedarrow_forwardWhich of the following statements is/are true? Choose only the best answer. All three of the other statements are true. Genome rearrangements can be caused by errors during meiosis. Transposable elements can result in gene deletion by facilitating unequal crossing over. DNA polymerase replication errors can lead to changes in the number of repeats in simple sequence DNA.arrow_forwardHaving the correct number and structure of chromosomes is not enough. What else is important?arrow_forward
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cell division of meiosis and mitosis; Author: Stated Clearly;https://www.youtube.com/watch?v=A-mFPZLLbHI;License: Standard youtube license