Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 12, Problem 6U
a. an alteration of dominance for multiple alleles of a single gene.
b. the presence of multiple alleles for a single gene.
c. the action of one gene on multiple phenotypes.
d. the action of multiple genes on a single phenotype.
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According to the video “The Biology of Skin Color”, why is it that the allele coding for darker skin did not evolve to protect us from skin cancer?
A. Because skin cancer isn't harmful
B. Darker skin did develop to protect us from skin cancer
C. Because skin cancer usually develops after an individual's reproductive years, so it doesn't affect the ability for someone to pass on their genes
D. Because skin cancer usually develops before an individual's reproductive years, so it doesn't affect the ability for someone to pass on their genes
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Red roan hair colour in some horses is due to codominance of the white allele and the red allele. If a red roan horse mates with a white horse, indicate the genotypic and phenotypic ratios that would result.
IN TRANSYLVANIA, SOME PEOPLE EXHIBIT TWO UNUSUAL TRAITS IN WHICH THEY HAVE VERY LONG FRONT TEETH AND THE INABILITY TO BE AWAKE WHEN THE SUN IS UP. BOTH OF THESE TRAITS APPEAR TO BE RECESSIVE. IF A WOMAN WHO IS HETEROZYGOUS FOR TEETH AND HOMOZYGOUS NORMAL FOR BEING IN THE SUN MARRIES A MAN WHO HAS BOTH THESE TRAITS, WHAT COULD BE THE PHENOTYPES AND GENOTYPES OF THEIR CHILDREN? USE A PUNNET SQUARE AND SHOW ALL WORK. LIST THE RATIOS FOR THE GENOTYPES AND PHENOTYPES.
Chapter 12 Solutions
Biology
Ch. 12 - What property distinguished Mendels investigation...Ch. 12 - The F1 generation of the monohybrid cross purple...Ch. 12 - The F1 plants from the previous question are...Ch. 12 - In a cross of Aa Bb cc X Aa Bb Cc, what is the...Ch. 12 - An organisms __________ is/are determined by its...Ch. 12 - Phenotypes like height in humans, which show a...Ch. 12 - Japanese four oclocks that are red and tall are...Ch. 12 - If the two genes in the previous question showed...Ch. 12 - What is the probability of obtaining an individual...Ch. 12 - Prob. 4A
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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
- If a dominant trait shows a penetrance of 50%, then ___. A. All affected individuals in the population are heterozygotes. B. Individuals who have the gene show an intermediate trait. C. Half the individuals in the population have the gene. D. Half the individuals in the population who have the gene show the trait.arrow_forwardPlease use instructions from above Red roan hair colour in some horses is due to codominance of the white allele and the red allele. If a red roan horse mates with a white horse, indicate the genotypic and phenotypic ratios that would result.arrow_forwardA fungus with white spores cross fertilizes a fungus with black spores. If 10% of the progeny bear white spores while 90% of the progeny bear black spores, what must be true? A. The trait for spore color is determined by exactly one gene. B. The trait for spore color is determined by more than one gene. C. The allele for black spores is dominant over that for white spores. D. The allele for white spores is dominant over that for black spores.arrow_forward
- Labrador retrievers’ fur color is controlled by two alleles, E and B. Any dog with the ee__ genotype develops into a yellow lab, while B_E_ dogs become black labs and bbE_ dogs become chocolate labs. This is an example of _____. a. epistasis b. codominance c. incomplete dominance d. linkagearrow_forwardA population of mice contains 20 animals Show work here: with white tails and 30 animals with grey tails. Grey tails are the dominant trait. a. What is the frequency of the white allele? b. What is the frequency of the grey allele? c. What is the frequency of heterozygotes? d. What is the frequency of mice homozygous for the grey allele?arrow_forwardImagine you are studying tail length in giant lobsters. You discover that one genetic locus influences tail length. The alleles at the locus are T and t. A lobster with a tt genotype has a tail length of 2 feet. A lobster with a genotype of Tt has a tail length of 3 feet. And a lobster with a TT genotype has a tail length of 4 feet. Based on this information the genetic variation at this locus is best described as what? a. Additive genetic variation b. Dominant genetic variation c. Environmental genetic variation d. Fixed genetic variationarrow_forward
- Issues with inbreeding often occurs with dog breeds, such as German shepherds. How can we the best describe inbreeding? a. successive breeding with individuals from a variety of populations b. successive breeding within individuals from within one population c. breeding between different breeds to produce new breeds d. breeding the same set parents more than oncearrow_forwardScurs in cattle is a sex-influenced trait. A cow with no scurs whosemother had scurs had offspring with a bull with scurs whose fatherhad no scurs. What are the probabilities of each of the followingcombinations of offspring? A. The first offspring will not have scurs.B. The first offspring will be a male with no scurs.C. The first three offspring will be females with no scursarrow_forwardA population of birds may have red feathers or orange feathers. Red feathered birds have the genotype RR or Rr. Orange feathered birds have the genotype rr. The frequency of the RR genotype is .46 a. What is the frequency of heterozygous birds? B. What is the frequency of the R allele ? C. What is the frequency of r allele?arrow_forward
- In some cats, the gene for tail length shows incomplete dominance. When a cat with a long tail is bred to a cat with no tail, the resulting offspring have short tails. For each of the following, predict the types of offspring that would result: a) A long tail cat bred to a cat with no tail b) A long tail cat bred to a short tail cat c) Two short tail catsarrow_forwardA farmer performs truncation selection to try to increase the weight of peaches in his orchard. Which statement correctly describes a possible outcome of this selection? a) If peach weight is not heritable, the average weight in the next generation will increase. b) If peach weight is heritable, the average weight in the next generation will increase. c) The average peach weight will decrease due to this inbreeding. If peach weight is heritable, the average weight in the next generation will decrease.arrow_forwardIn guinea pigs, black fur is dominant over white fur. If a homozygous dominant guinea pig were crossed with a homozygous recessive guinea pig, the first generation of offspring would _____. Select all that apply. a be heterozygous b be phenotypically identical c have all black fur d have half black fur and half white fur e be homozygousarrow_forward
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