EBK BIOLOGY
5th Edition
ISBN: 8220100667978
Author: Maier
Publisher: PEARSON
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Chapter 7, 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?
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.
Which 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 above
Chapter 7 Solutions
EBK BIOLOGY
Ch. 7 - What is the relationship between genotype and...Ch. 7 - Prob. 2LTBCh. 7 - Prob. 3LTBCh. 7 - Prob. 4LTBCh. 7 - Prob. 5LTBCh. 7 - Scientists have recently developed a process by...Ch. 7 - What is the physical basis for the independent...Ch. 7 - Prob. 8LTBCh. 7 - Prob. 9LTBCh. 7 - Prob. 10LTB
Ch. 7 - Prob. 1GPCh. 7 - Prob. 2GPCh. 7 - Prob. 3GPCh. 7 - Prob. 4GPCh. 7 - Pfeiffer syndrome is a dominant genetic disease...Ch. 7 - Prob. 6GPCh. 7 - A cross between a pea plant that produces round...Ch. 7 - Prob. 8GPCh. 7 - The allele BRCA2 was identified in families with...Ch. 7 - Two parents both have brown eyes, but they have...Ch. 7 - Prob. 2AAATBCh. 7 - Prob. 3AAATBCh. 7 - Prob. 1CTSCh. 7 - Prob. 2CTSCh. 7 - Prob. 3CTS
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- All 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_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_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_forward
- Which 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_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_forwardWhich 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_forward
- Which of the following best explains why chromosomes 13, 18 and 21 are the only autosomes that are viable as trisomies.arrow_forwardWhat would be the result of the following? the centromere is missing from a cell a chromosome contains more than one centromerearrow_forwardThe duck billed platypus is an unusual mammal. If you examine the sex chromosomes of a female platypus you will find a total of 10 X chromosomes. Examining a male platypus finds 5 X chromosomes and 5 Y chromosomes. No other combinations are seen. Each of these five X chromosomes is unique as is each Y chromosome (i.e. X1 pairs only with X1 or Y1, X2 with X2 or Y2 and so on). Why is this unusual? What unusual event must happen during meiosis in a male platypus? (Think carefully about what happens in meiosis 1)arrow_forward
- Which of the following statements about mitosis and meisois are TRUE? (check all that apply) Mitosis produces genetically identical cells, whereas meiosis produces genetically variable (different) cells. Mitosis consists of a single nuclear division, whereas meiosis consists of two nuclear divisions. DNA replication occurs prior to mitosis and meiosis I. Crossing over occurs in both meiosis I and meiosis II. The number of chromsoomes in newly formed cells is the same as the mother cell in both mitosis and meiosis. 00000arrow_forwardIn the koala, a newly created somatic cell (such as a skin cell) contains 16 total chromosomes. When a male koala germ cell undergoes meiosis, which of the following is true? Select all that apply The value of n for the koala is 8 After meiosis I, a cell will have 8 chromosomes per cell The sperm cell of the kOala will contain 16 chromosomes After DNA replication, the koala's cell wil have 32 chromosomesarrow_forwardThe organism you are working with has the following chromosomes. Place the chromosomes of this organism onto the cell below such that the diagram accurately shows a primary meiocyte from this organism in metaphase I of meiosis. Note 1: Only place chromosomes you need. You don't need them all. Note 2: You can place the 'Blank Box' image if you don't think you need a chromosome at a particular position. Dashed linethe metaphase platearrow_forward
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