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Description: Describe why polygenic inheritance is much more important that simple single-gene dominant andrecessive genetic relationships

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Biology

Describe why polygenic inheritance is much more important that simple single-gene dominant and recessive genetic relationships

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter16: Human Genetics And The Human Genome

Section: Chapter Questions

Problem 10TYU: Examine the following pedigrees. Which is the most likely mode of inheritance of each disorder? (a)...

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Concept explainers

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.

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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 how polygenic inheritance may result in a continuum of phenotypes.
Explain how polygenic inheritance differs from inheritance that is controlled by only one gene?
Describe the importance of alleles in autosomal and sex-linked inheritance.
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…
Describe some characteristics of incomplete dominance, multiple allele inheritance, sex-linked inheritance, and provide examples for each
Name: Class Date Polygenic Inheritance: Cat Coat Color Read aboutthe inheritance of cat coat color In each cat below, predict the phenotype of each genotype and color in each catl Make sure you indicate whether each cat is male or female One gene that affects coat color in cats is an x linked gene we'll call the pigment gene. One allele causes black fur (X) and one allele gives the cat orange fur (X"). These alleles act in a codominant manner, because when a cat has two different alleles (XB Xb), the cat has a pattern called tortoise shell, where the cat has both orange and black hairs. The Y chromosome does not have this coat color gene There is another gene that affects coat color in cats called the piebalding gene. This gene is on an autosomal chromosome and the alleles affect the amount of white patches that appear in the cat's coat, Some cats (ss) have o white patches and their other colors are blended, not patchy. Some cats (SS or Ss) have white patches and their other colors are…
2 4 points Select the correct mode of inheritance corresponding to this information: Females with AA or Aa genotype are affected, males with AA or Aa are affected, females with aa are unaffected, males with aa are unaffected. Sex-linked recessive. Autosomal recessive. Autosomal dominant. Autosomal dominant, homozygous lethal. 3 4 points There are more chromosomes in one human genome than there are human genes. True False 4 points In a true brooding parental croce for an AD diceace trait the ovnerted proportion of offenring in the Fa generation that are affected ic 3 $ 5 MacBook Air 7
Describe polygenic inheritance.
Discuss the concept of multifactorial inheritance, and include two examples.
For mode of inheritance choose between Modes of Inheritance for Single Gene Traits • Autosomal Dominant • Autosomal Recessive • X-linked Dominant • X-linked Recessive • Y-linked • Mitochondrial Let us assume that alleles for these traits follow complete dominance.
explain how polygenic inheritance and environmental influences combine to produce nearly continuous variation in many phenotypes?