Concept explainers
Videos
Connecting the Concepts
1. Complete this concept map to help you review some key concepts of genetics.
To complete: The given map showing some key concepts of genetics.
Introduction: Genetics forms the basis of heredity. It is the study of genes, inheritance patterns, and their expression leading to various traits in living beings.
Answer to Problem 1CC
Pictorial representation: Fig. 1 shows the completed map key concepts of genetics.
Fig.1:Key concepts of genetics
Explanation of Solution
(a)
Correct answer: Alleles
Explanation: Genes have alternate forms known as alleles. The two alleles of a gene segregate into different gametes and are transmitted to offspring. Hence, the correct answer is alleles.
(b)
Correct answer: Loci
Explanation: Genes are DNA sequences that code for specific traits. The specific position of a gene on a chromosome is known as locus. The plural of locus is loci. Hence, the correct answer is loci.
(c)
Correct answer: Homozygous
Explanation: The alleles of a gene segregate into gametes and transmitted to offspring. They are dominant and recessive alleles. When the two alleles are same in an individual(either dominant or recessive), its genotype is homozygous. Hence, the correct answer is homozygous.
(d)
Correct answer: Dominant
Explanation: Dominance in alleles of a gene occurs when a phenotypic effect of one allele suppresses the phenotypic effect of a second allele. If the two alleles are different in an individual, then the dominant allele out of the two alleles expresses itself and determines the phenotype. Hence, the correct answer is dominant.
(e)
Correct answer: Recessive
Explanation: A dominant allele masks the expression of a second allele. The masked allele is known as recessive because its phenotypic effect is suppressed. Hence, the correct answer is recessive.
(f)
Correct answer: Incomplete dominance
Explanation: Dominance explains how different alleles of a gene express themselves. Some genes show incomplete dominance, which means that individuals with homozygous alleles produce offspring that is intermediate of the two parent alleles. Hence, the correct answer is incomplete dominance.
Want to see more full solutions like this?
Chapter 9 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
- help with following questionI would really appreciate it if you can explain how you got to the final answerarrow_forwardA 4. You are given three different substances that are known mutagens. Using a variety of techniques, you analyze the results of exposure to these substances. Your findings are shown in the table below. Using this data, link each of the three substances with one of the following molecular properties and explain your choice. B C I. Substance II. III. One mutagen that looks like cytosine but forms a covalent bond with guanine One mutagen that can bind with either adenine or guanine A molecule that can insert itself between two base pairs in a DNA strand Result of exposure Increases the number of mutants that produce mRNA with AGA codons instead of AAA codons Significantly fewer viable colonies Increase in mutants containing frameshift mutationsarrow_forwardPlease help me with my biology labarrow_forward
- The world can be a scary place. There are many disease causing organisms and genetic disorders that can make life difficult. As you read the chapter, be thinking about your family history of genetic disorders, how these disorders are passed on through generations, and what types of testing can be done to look for these alleles. In this exercise you will reflect on the pros and cons of genetic testing and how it may affect you. Please remember to add a question to engage your classmates in the discussion. What might the consequences be of having this information (e.g. health insurance coverage, privacy, etc.)?arrow_forwardAnalyzingHair Length Analyzing Hair Color Two genetic crosses have been proposed between male and female mice with varying hair length. These traits are described in the table below. For each genetic cross, complete the sentence that describes the predicted outcome of the cross. Use a separate sheet of paper to construct a Punnett square for each cross to accurately make your predictions. Allele Dominant or recessive? Trait description B dominant short hair recessive long hair 1. Baby mice produced from the cross between male BB and female bb parents will include Choose genotypes and Choose - phenotypes. 2. Baby mice produced from the cross between male Bb and female Bb parents will include Choose genotypes and Choose - phenotypes. javascript void(0), DELL SCarrow_forwardHelparrow_forward
- Why some people resort to phenocopy? Numerically list down two pros and cons of phenocopying Comment in not more than 30 words these lines. “ No two people are exactly alike. Even monozygotic twins differ from each other”.arrow_forwardPlease show your work, provided an example to helparrow_forward1. Read on history of genetics. Choose 6 persons who you consider had contributed most importantly to this science. In short phrases, indicate their contributions to genetics that you appreciate so much.arrow_forward
- Hello, could I get help with this, please and thank you! {Attachment below}arrow_forwardQuestion is in the image. Thank you so much!arrow_forwardDescribe your amplicon based on molecular size. Comparing the size of the genomic DNA Describe your amplicon based on molecular size. Comparing the size of the genomic DNA (as seen in Fig. 8.1) and the PCR products based on band position in the gel (as seen in Fig. 8.2).arrow_forward
Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning