Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 11.4, Problem 1C
Summary Introduction
To explain: Human ABO blood groups are examples of both dominance and codominance but flower color in four o’clock plants are examples of incomplete dominance.
Introduction: Not all types of inheritances follow Mendelian pattern of inheritance. Codominance and incomplete dominance have non-Mendelian pattern of inheritance. The appearance of both parental
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Red-green colorblindness is determined in humans by a single X-linked locus. Colorblind males are XbY, and males with normal vision are XBY. XB is dominant, so XBXB and XBXb females have normal vision, while XbXb females are colorblind. Typically, 8% of males are red-green colorblind. Assuming H-W equilibrium, what percentage of females is typically colorblind?
A white flower is crossed with a purple flower, and the offspring exhibit incomplete dominance.
A) What is the phenotypic ratio of the F1 generation offspring? What is the genotypic ratio
of the F1 generation offspring?
B) What is the phenotypic ratio of the F2 generation offspring? What is the genotypic ratio
of the F2 generation offspring?
Answer and work:
Which of the following is an example of incomplete dominance? Select ALL that apply.
RR and Rr seeds are round, whereas rr seeds are wrinkled,
Rr seeds contain 50% as much starch as RR seeds.
o AcR individuals produce red flowers, CWCW individuals produce white flowers, and heterozygotes (C*C") produce pink flowers.
AP individuals produce both the A and the B antigens.
individuals produce the A antigen.
Chapter 11 Solutions
Biology (MindTap Course List)
Ch. 11.1 - Define the terms phenotype, genotype, locus,...Ch. 11.1 - Describe Mendels principles of segregation and...Ch. 11.1 - Distinguish among monohybrid, dihybrid, and test...Ch. 11.1 - Explain Mendels principles of segregation and...Ch. 11.1 - What is the maximum number of different alleles...Ch. 11.1 - Can Mendels principle of segregation be...Ch. 11.1 - Prob. 3CCh. 11.2 - PREDICT Use the rules of probability to answer the...Ch. 11.2 - In answering the previous question, did you use...Ch. 11.3 - Define linkage and relate it to specific events in...
Ch. 11.3 - Show how data from a two-point test cross can be...Ch. 11.3 - Discuss the genetic determination of sex and the...Ch. 11.3 - What ratio of genotypes to phenotypes is observed...Ch. 11.3 - Prob. 2CCh. 11.3 - CONNECT Two loci exhibit 5% recombination between...Ch. 11.3 - Which chromosome determines the male sex in humans...Ch. 11.3 - Prob. 5CCh. 11.4 - Explain some of the ways genes may interact to...Ch. 11.4 - Distinguish among incomplete dominance,...Ch. 11.4 - Prob. 11LOCh. 11.4 - Prob. 1CCh. 11.4 - What is the difference between multiple alleles...Ch. 11.4 - Prob. 3CCh. 11.4 - Prob. 4CCh. 11 - One of the autosomal loci controlling eye color in...Ch. 11 - The F1 flies described in question 1 were mated...Ch. 11 - The type of cross described in question 2 is (a)...Ch. 11 - Individuals of genotype AaBb were crossed with...Ch. 11 - Assume that the ratio of females to males is 1:1....Ch. 11 - Redgreen color blindness is an X-linked recessive...Ch. 11 - When two long-winged flies were mated, the...Ch. 11 - The long hair of Persian cats is recessive to the...Ch. 11 - Mr. and Mrs. Smith are concerned because their own...Ch. 11 - A walnut comb rooster is mated to three hens. Hen...Ch. 11 - Individuals of genotype AaBb were mated to...Ch. 11 - Genes A and B are 6 map units apart, and A and C...Ch. 11 - VISUALIZE Sketch a series of diagrams showing each...Ch. 11 - Can you always ascertain an organisms genotype for...Ch. 11 - CONNECT Compare the mechanisms of genetic...Ch. 11 - EVOLUTION LINK Darwins theory of evolution by...Ch. 11 - INTERPRET DATA Using the graph in Figure 11-20,...
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- In four o’clock(a type of flowering plant), red color flowers exhibit incomplete dominance over white; when both exist together, the flowers are pink a) in a cross between a red flower and a white one, what is the genotype of the offspring? b) what is the genotypes ratio of the F2 generation of two of the F1 from (a) are crossed?arrow_forwardGive typed explanation In pea plants, the tall allele (T) is dominant to the dwarf allele (t) and the yellow pea color allele (Y) is dominant to the green pea color allele (y). Cross TtYy with Ttyy. What would be the genotype and phenotype ratios in their offspring? (Please include the gametes produced by each parent.)arrow_forwardThe self-fertilization of an F1 pea plant produced froma parent plant homozygous for yellow and wrinkledseeds and a parent homozygous for green and roundseeds resulted in a pod containing seven F2 peas. (Yellow and round are dominant.) What is the probability that all seven peas in the pod are yellow and round?arrow_forward
- 1) If TT is mated with Tt, how many of the offspring will genotypically turn out as tt? 2) If TT is mated with Tt, how many of the offspring will phenotypically turn out as t ?arrow_forwardFive human matings numbered 1–5 are shown in the following table. Included are both maternal and paternal phenotypes for ABO and MN blood-group antigen status. Each mating resulted in one of the five offspring shown to the right (a–e). Match each offspring with one correct set of parents, using each parental set only once. Is there more than one set of correct answers?arrow_forwardShown in the pictures below are the degrees of dominance in the inheritance of flower color in some plants. *Based on the phenotypes (or maybe genotype), differentiate between complete dominance, incomplete dominance, and codominance. Be able to discuss the difference briefly but concisely. You may also refer to the definition.arrow_forward
- If the frequency of the "green" form of red-green color blindness (due to an X-linked locus) is 5 percent among males, what fraction of females would be affected? Assuming H-W equilibrium what fraction of females would be heterozygous?arrow_forwardWhat is dominance? Explain.arrow_forwardA fruit fly with a gray body and red eyes (genotype BbPp) is mated with a fly having a black and purple eyes (genotype bbpp). Show diagrammatically a genetic cross between the two flies and the possible genotypes and phenotypes of F1. What ratio of offspring would you expect if the body-colour and eye-colour genes are on different chromosome (unlinked)? When mating is actually carried out, most of the offspring look like the parents, but 3% have a gray body and purple eyes, and 3% have a black body and red eyes. Compare and discuss the observation with your answer in part (arrow_forward
- NLFN3, a gene in the X chromosome has been linked to Autism spectrum disorder ASD. Research has shown that the mutation R451C (represented by the allele X+) is recessive and causes ASD. Ear lobes in humans are coded by a single gene which displays simple dominance. E results in free earlobes, and e corresponds to attached earlobes. What is the probability of having a female offspring with ASD symptoms and attached earlobes from X+Y Ee and X+X ee parents? 25% O 100% 0% O 75% O 12.5% O 50%arrow_forwardProvide an example of incomplete dominance. Does the genotypic ratio equal the phenotypic ratio?arrow_forwardAn Agouti with Himalayan gene female rabbit was mated by an albino male. The phenotypes for the filial generation are...arrow_forward
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