LO 78- Explain how organismal phenotypes can be influenced by more than one gene. Select the statements that are true about inheritance patterns of phenotypes In Mendelian inheritance, a single gene codes for a molecule which affects a single trait Organismal traits can be monogenic or polygenic Pleiotropy is the existence of a wide range of phenotypes for a single trait Several regulatory genes can be related to several structural genes, giving rise to many possible phenotypes A gene can only affect one trait at a time

LO 78- Explain how organismal phenotypes can be influenced by more than one gene. Select the statements that are true about inheritance patterns of phenotypes In Mendelian inheritance, a single gene codes for a molecule which affects a single trait Organismal traits can be monogenic or polygenic Pleiotropy is the existence of a wide range of phenotypes for a single trait Several regulatory genes can be related to several structural genes, giving rise to many possible phenotypes A gene can only affect one trait at a time

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Description: 1LO 78- Explain how organismal phenotypes can be influenced by more than one gene.Select the statements that are true about inheritance patterns of phenotypesIn Mendelian inheritance, a single gene codes for a molecule which affects a single traitOr

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter5: The Inheritance Of Complex Traits

Section: Chapter Questions

Problem 8QP: Clubfoot is a common congenital birth defect. This defect is caused by a number of genes but appears...

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Clubfoot is a common congenital birth defect. This defect is caused by a number of genes but appears to be phenotypically distributed in a noncontinuous fashion. Geneticists use the threshold model to explain the occurrence of this defect. Explain this model. Explain predisposition to the defect in an individual who has a genotypic liability above the threshold versus an individual who has a liability below the threshold.
In cats, the genotype AA produces tabby fur color; Aa is also a tabby, and aa is black. Another gene at a different locus is epistatic to the gene for fur color. When present in its dominant W form (WW or Ww), this gene blocks the formation of fur color and all the offspring are white; ww individuals develop normal fur color. What fur colors, and in what proportions, would you expect from the cross AaWw Aa Ww?
A heterozygous individual has a _______ for a trait being studied. a. pair of identical alleles b. pair of nonidentical alleles c. haploid condition, in genetic terms
Two mothers give birth to sons at the same time at a busy urbanhospital. The son of mother 1 has hemophilia, a disease causedby an X-linked recessive allele. Neither parent has the disease.Mother 2 has a son without hemophilia, despite the fact thatthe father has hemophilia. Several years later, couple 1 suesthe hospital, claiming that these two newborns were swappedin the nursery following their birth. As a genetic counselor, youare called to testify. What information can you provide the juryconcerning the allegation?
We will examine some human phenotypes that are controlled by a single gene. For each characteristic, you will determine your phenotype, possible genotype(s), and the frequency of your phenotype in the class. Tongue-rolling: a single gene with two alleles, R and r, determines a person’s ability to roll their tongue into a U shape. A person that cannot roll their tongue is homozygous recessive (rr). What is your phenotype? _____ What is your genotype(s)? _____ What is the frequency of your phenotype? (show your work) _________ Widow’s peak: a single gene with two alleles, W and w. The dominant allele (W) results in a hairline that forms a distinct point in the center of the forehead. What is your phenotype? _____ What is your genotype(s)? ____ What is the frequency of your phenotype? (show your work)
1-Gigantism is being traced in a family through a pedigree. Its mode of inheritance is thought to be autosomal recessive. You examine the pedigree and decide that the mode of inheritance is not correct. What is the correct mode of inheritance? 2-Provide 2 pieces of evidence for the mode of inheritance selected for Gigantism. (i.e.- Individual 45 is afflicted and passed it on to all of her offspring, indicating that it is dominant. Or there is a gendered pattern of inheritance seen when Individual 99 passed it on to only his female offspring.)
1. Huntington’s disease is a dominant trait inheritance in humans. What is/are the possible genotype/s of the mother if her husband does not exhibit the disease, but their children unfortunately got the disease? A. hh only B. HH only C. HH or Hh D. Hh only 2. Huntington’s disease is a dominant trait inheritance in humans. What is/are the possible genotype/s of the children if both parents do not exhibit Huntington’s disease? A. Hh only B. hh only C. HH or Hh D. HH only 3. Huntington’s disease is a dominant trait inheritance in humans. What is the probability of having a normal child if the mother does not have the disease while her husband has the disease? A. 0% or 50% B. 100% C. 25% D. 0% or 25% E. 50% 4. Huntington’s disease is a dominant trait inheritance in humans. What is the probability of having a girl child with Huntington’s disease if both mother and father has the heterozygous genotype for the disease? A. 0% B. 50% C. 75%…
12. A heterozygous agouti mink is bred with a true-breeding white mink. Of the three offspring, one is an agouti male, one is a white male, and one is a black female. What is thesimplest explanation as to coat colour inheritance in these mink? the agouti allele is sex-linked a single gene is involved with the agouti allele being dominant a single gene is involved with the white allele being recessive at least two genes are involved
Pedigree attached shows an autosomal recessive genetic disease. G is the normal allele and g is the disease-causing allele. Individual 1’s father is heterozygous (*) and his mother is homozygous dominant. Other individuals in the pedigree may be carriers, but are not marked. The question mark (?) indicates that you do not yet know anything about this individual’s phenotype with regard to the disease. part a) What is the probability that individuals 1 and 2 will have a child (5) who is a boy with the disease (the child is unborn and the sex is not yet known)? a)1/8 b)1/4 c)0 d)1/16 part b) What is the probability that the daughter (6) that individual 3 and 4 just had will have the disease? a)1/8 b)1/6 c)1/4 d)1/12
Tay-Sachs is a recessive lethal disease in which thereis neurological deterioration early in life. This diseaseis rare in the population overall but is found at relatively high frequency in Ashkenazi Jews from EasternEurope. A woman whose maternal uncle had the disease is trying to determine the probability that sheand her husband could have an affected child. Her father does not come from a high-risk population. Herhusband’s sister died of the disease at an early age.a. Draw the pedigree of the individuals described.Include the genotypes where possible.b. Determine the probability that the couple’s firstchild will be affected.
5) Humans who have an abnormally high level of cholesterol are said to suffer from familialhypercholesterolemia.  The gene for this disorder is dominant (C). A man who isheterozygous for familial hypercholesterolemia marries a woman who is homozygousfor the recessive allele. What is the probability that they will have children that sufferfrom this disorder? please draw the puutnet square and also write the parents and gemtaics top the puutnet square thanks
In individuals affected by cystic fibrosis, salt crystals may appear afterperspiration dries up. In addition, the disease causes respiratory disorderswhich can be both debilitating and lethal. It occurs in individuals homozygousfor recessive gene. If 2 normal parents had a daughter with the symptoms ofthis disease, and a normal son, what is the probability that he might be acarrier of the recessive gene?Express answer in fraction form.