Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 11.5, Problem 2CYL
- explain how polygenic inheritance and environmental influences combine to produce nearly continuous variation in many
phenotypes ?
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Which of the following defines polygenic inheritance?
An inheritance pattern in which one allele is not fully dominant over another, so the heterozygous phenotype is an intermediate blend of the two homozygous phenotypes
An inheritance pattern in which the full and separate phenotypic effects of two alleles are apparent in heterozygous individuals
An inheritance pattern in which a single gene affects multiple traits
A pattern of inheritance in which multiple genes affect one trait
Describe the differences between an incompletely dominant trait and a codominant trait.
Name:
Human Phenotypes
Simple dominance inheritance pattern:
Q: How many phenotypes are evident in patterns of simple dominance? What are they?
If a phenotype results from simple dominance, which two genotypes cannot be
distinguished?
Which phenotype is always representative of the genotype?
Now determine your personal inheritance of the following traits. As you read through
the following descriptions, you'll identify your trait, and determine your phenotype.
Your trait will be one of the two
Shape of the face.
Most facial characteristics are affected by many different genes acting together
(multiple factors or polygenic inheritance). For this trait we have simplified the nature
of this trait by assuming it is the result of a single gene. Oval shape is dominant (needs
only
homozygous (both alleles are the same, either dominant or recessive) or heterozygous
(one dominant allele and one recessive allele). Square shape is recessive (requires that
both alleles are the recessive allele in…
Chapter 11 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 11.1 - describe the relationships among chromosomes, DNA,...Ch. 11.1 - Prob. 2CYLCh. 11.2 - distinguish between self-fertilization and...Ch. 11.2 - Prob. 2CYLCh. 11.3 - Sudden Death on the court Many traits, in humans...Ch. 11.3 - describe the pattern of inheritance of a trait...Ch. 11.3 - Prob. 1TCCh. 11.3 - Prob. 2CYLCh. 11.3 - Prob. 3CYLCh. 11.4 - Prob. 1CYL
Ch. 11.4 - Prob. 1TCCh. 11.4 - Prob. 2CYLCh. 11.4 - Prob. 2TCCh. 11.4 - Prob. 3CYLCh. 11.5 - Prob. 1CSCCh. 11.5 - Prob. 1CYLCh. 11.5 - Prob. 1HYEWCh. 11.5 - Prob. 1TCCh. 11.5 - explain how polygenic inheritance and...Ch. 11.6 - describe how the patterns of inheritance differ...Ch. 11.7 - Prob. 1CYLCh. 11.7 - explain why most sex-linked traits are controlled...Ch. 11.7 - describe the pattern of inheritance of sex-linked...Ch. 11.8 - Prob. 1CSRCh. 11.8 - use pedigrees to determine the pattern of...Ch. 11.8 - Prob. 1ETCh. 11.8 - Prob. 1TCCh. 11.8 - Prob. 2CYLCh. 11.8 - Prob. 2ETCh. 11 - Prob. 1ACCh. 11 - An organism is described as Rr, with red coloring....Ch. 11 - In certain cattle, hair color can be red...Ch. 11 - Prob. 1MCCh. 11 - Define the following terms: gene, allele,...Ch. 11 - Prob. 2ACCh. 11 - Prob. 2FIBCh. 11 - Prob. 2GPCh. 11 - Prob. 2MCCh. 11 - Prob. 2RQCh. 11 - Prob. 3FIBCh. 11 - Prob. 3GPCh. 11 - Prob. 3MCCh. 11 - Prob. 3RQCh. 11 - Genes that are present on one sex chromosome but...Ch. 11 - Prob. 4GPCh. 11 - Prob. 4MCCh. 11 - Prob. 4RQCh. 11 - Prob. 5FIBCh. 11 - Prob. 5GPCh. 11 - Prob. 5MCCh. 11 - Prob. 5RQCh. 11 - Prob. 6GPCh. 11 - Prob. 6RQCh. 11 - In the couple described in Problem 6, the woman...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Explain how the phenotypes for incompletely dominantand codominant traits differ from dominant/recessive traitphenotypes.arrow_forwarddescribe the patterns of inheritance of traits showing incomplete dominance, codominance, and multiple alleles?arrow_forwardDiscuss how polygenic inheritance makes possible manyvariations of a trait.arrow_forward
- Explain the characteristics of polygenic and multifactorial traits.arrow_forwardWhat is nondisjunction? Why does it cause chromosomal abnormalities? What is aneulploidy? Trisomy? Monosomy? Which kind of monosomy always results in miscarriage in early pregnancy? What do these terms mean: genotype, phenotype, allele, homozygous, heterozygous? Be able to recognize single gene inheritance patterns [autosomal dominant, autosomal recessive, X linked recessive] from a pedigree. Also, how are simple Mendelian traits transmitted? What genotype produces the phenotype? Why do some inheritance patterns result in many more males than females showing the phenotype? What inheritance patterns do Huntington disease and sickle cell anemia, and hemophilia follow (autosomal dominant or autosomal recessive, or X-linked recessive)? What are some of the symptoms of these diseases?arrow_forwardConsider a discrete character with three distinct phenotypes (dark blue hair, light blue hair, or white hair) controlled by two alleles (B and b) at a single locus. If two copies of the B allele are required for an individual to have dark blue hair, and one copy of the B allele produces light blue hair, what is the most likely underlying inheritance mechanism: Co-dominance Incomplete dominance Simple dominance Blending inheritance Blending dominancearrow_forward
- Explain the Multiple-Gene Hypothesis for Quantitative Inheritance ?arrow_forwardHow is pedigree analysis used to determine whether a trait is inherited in an autosomal-dominant, autosomal-recessive, or X-linked pattern?arrow_forwardDescribe the concept of the extended phenotype. Can you think of a trait that you consider to be your own that could perhaps be due to the genetics of another organism you’ve interacted with in your life?arrow_forward
- describe the pattern of inheritance of a trait controlled by a single gene with two alleles, one dominant and one recessive?arrow_forwardIn sex-linked inheritance, if a colour blind man mates with a heterozygous woman, what is the expected ratio of phenotypes among the offsprings? normal female : heterozygous female : normal male : colour-blind male (1 : 1 :1: 1) normal female : normal male : colour-blind male (2 :1: 1) normal female : heterozygous female : normal male (1:1:2) heterozygous female: colour blind female: normal male: colour-blind male (1: 1: 1: 1)arrow_forwardColor-blindness (c) is a sex-linked recessive trait, while normal color vision (C) is dominant: If two normal-visioned parents have a color-blind son, what are the parent's genotypes? ~What are the chances that their children will be color-blind?arrow_forward
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