Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 7, Problem 4LTB
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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The allele types for a single gene are given symbols that represent the organisms
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Match each description with the correct genetic term.
A trait expressed in offspring
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Identical paired alleles for a gene (TT or tt)
Two different alleles for a gene (Tt)
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The outward appearance of the alleles
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Gene
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Heterozygous
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Recessive
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Dominant
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Homozygous
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Chapter 7 Solutions
Biology: Science for Life with Physiology (5th Edition)
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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- Which of the following defines a genotype? The particular set of alleles that is carried in an individual’s chromosomes A part of a chromosome that encodes an RNA or protein product in its DNA sequence Forms of a gene with slightly different DNA sequences that may encode slightly different versions of the gene’s product An individual’s observable traitsarrow_forwardThe IA allele is to the IB allele and to the i allele. codominant; codominant codominant; completely dominant completely dominant; codominant completely dominant; completely dominantarrow_forwardA gene is composed of two alleles. An allele can be either dominant or recessive. Suppose that a husband and wife, who are both carriers of the sickle-cell anemia allele but do not have the disease, decide to have a child. Because both parents are carriers of the disease, each has one dominant normal-cell allele (S) and one recessive sickle-cell allele (s). Therefore, the genotype of each parent is Ss. Each parent contributes one allele to his or her offspring with each allele being equally likely. Complete parts a) through c) below. a) Genes are always written with the dominant gene first. Therefore, there are two instances the offspring could have genotype Ss (one if the mother contributes the dominant allele and the father contributes the non-dominant allele; and one if the father contributes the dominant allele and the mother contributes the non-dominant allele). List the other two possible genotypes of the offspring. (Use a comma to separate answers as needed.)arrow_forward
- Define by giving an example : Allele.arrow_forwardWhich of these terms is correctly matched with its definition?a. autosome—an X or a Y chromosomeb. phenotype—the genetic makeup of an individualc. allele—variant form of a gene occupying locus on a homologouschromosomed. heterozygous—having two identical genes for a traite. recessive—a trait expressed when the genes are heterozygousarrow_forwardThe particular combination of alleles present in a given organism is referred to as a: Locus Gene Genotype Trait Phenotypearrow_forward
- Explain some of the ways genes may interact to affect the phenotype and discuss how a single gene can affect many features of the organism simultaneously.arrow_forwardAllele-specific gene inactivation by males and females during formation of gametes is called? Genomic imprinting Genetic imprinting DNA foot printing All of the abovearrow_forwardGenotype refers to the letters used as symbols for the genes. Phenotype refers to the appearance.Let’s practice assigning letters for the tall and short phenotype. Remember, we usually use the letter of the dominant (trait).arrow_forward
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