BIOLOGY: LIFE ON EARTH-W/MASTERING ACCE
2020th Edition
ISBN: 9780135686553
Author: Audesirk
Publisher: PEARSON
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Textbook Question
Chapter 11, Problem 2AC
In an alternate universe, all the genes in all species have only two alleles, one dominant and one recessive. Would every trait have only two
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Students have asked these similar questions
From your research, you discover that in this species of fish, the allele for black color is dominant to orange color. Based on this research, can you determine the genotype of a black fish just by looking at it? Why or why not?
Yes, because the recessive allele must have been eliminated by the dominant one.
Yes, because the phenotype always expresses all the alleles.
No, because you do not know the DNA sequence.
No, because it could be either homozygous dominant or heterozygous.
Organisms heterozygous for a recessive trait are often called carriers of that trait. What does that mean?
The term polymorphism can refer to both genes and traits. Explain what is meant by a polymorphic gene and a polymorphic trait. If a gene is polymorphic, does the trait that the gene affects also have to be polymorphic? Explain why or why not.
Chapter 11 Solutions
BIOLOGY: LIFE ON EARTH-W/MASTERING ACCE
Ch. 11 - The physical position of a gene on a chromosome is...Ch. 11 - If an organism has two different alleles (call the...Ch. 11 - Independent assortment means that a. two genes...Ch. 11 - If a gene is located on the X chromosome of a...Ch. 11 - 5. A test cross is used to determine
a. the...Ch. 11 - An organism is described as Rr, with red coloring....Ch. 11 - 2. The inheritance of multiple traits depends on...Ch. 11 - Prob. 3FTBCh. 11 - 4. Genes that are present on one sex chromosome...Ch. 11 - 5. When the phenotype of heterozygotes is...
Ch. 11 - 1. Define the following terms: gene, allele,...Ch. 11 - 2. Explain why genes located on the same...Ch. 11 - 3. Define polygenic inheritance. Why does...Ch. 11 - What is sex linkage? In mammals, which sex would...Ch. 11 - What is the difference between a phenotype and a...Ch. 11 - 6. In the pedigree of part (a) of Figure 11–22, do...Ch. 11 - Sometimes the term gene is used rather casually....Ch. 11 - In an alternate universe, all the genes in all...
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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
- You are examining a population of snakes in which 20% of the individuals exhibit the recessive phenotype for albinism. If albinism is exhibited only by the genotype aa, how many snakes out of a population of 100 would you expect to CARRY the albinism allele (so be Aa), but be normal color?arrow_forwardIn a species of plant, some individuals have smooth leaves and some have hairy leaves. The character (hairy or hairless leaves) is determined by a single gene. What is the simplest way to test the hypothesis that hairy leaves are the dominant trait?arrow_forwardLength of fur in guinea pigs is due to a dominant trait, while short-haired guinea pigs are due to a recessive trait. Can two homozygous recessive parents produce a short-haired offspring? why or why not?arrow_forward
- In Mexican hairless dogs, a double dose of a dominant allele may be lethal. What phenotype should the breeders combine to avoid losing lethal homozygous dominant class? What would be the resulting phenotype of the offsprings and its corresponding ratio?arrow_forwardIn this family tree, individuals with the trait are shown in black. Circles represent biological females. Squares represent biological males. Is the trait dominant or recessive? Explain your answer. Is the trait sex-linked? Explain your answer.arrow_forwardImagine you are working in a genetics lab with the fruit fly Drosophila melanogaster, a model organism for genetics research. You want to determine whether a trait you have discovered in fruit flies is dominant or recessive.• Explain how you would design an experiment to answer this question.• Predict what types of outcomes are possible. Which would indicate that the trait is dominant? Which would indicate that it is recessive?arrow_forward
- If our DNA contains all the information about who we are, how can something that does not involve changing the gene sequence cause changes in phenotypes? Describe briefly how these changes happen.arrow_forwardWhy are phenotypes the product of both their genes and their environments?arrow_forwardIn genetics, the dash symbol (–) is a “wild card” that stands for either the dominant allele or the recessive allele; for example, A– means the individual has either the genotype AA or Aa. Two genes that undergo independent assortment affect coat color in Duroc pigs. Each gene has two alleles, one of which is dominant for coat color. Genotypes of the form A– B– are red, those of the form A– bb and aa B– are sandy, and genotype aa bb is white. What ratio of red:sandy:white is expected from the cross Aa Bb x Aa Bb?arrow_forward
- Natural selection means that the environment favors survival of some genotypes. From where does diversity in genotypes come?arrow_forwardA scientist predicts that the kittens born with a congenital birth defect will be 25% based on the hypothesis that it is caused be a recessive gene in that breed of cat. After surveying several litters, he found that 44 out of 128 kittens had the defect. Is his hypothesis correct? Use Chi-Square to solvearrow_forwardYour biologist friend studies genetics of a new lizard found deep in the rainforest. The allele for a blue skin color, B, is dominant to the allele b which codes for gray-colored skin. He decided to mate a lizard that is heterozygous with a lizard that is gray. What proportion of the offspring will be gray? In your answer: - Show both lizards’ genotypes; - The complete Punnett square; - Answer the question.arrow_forward
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