Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 12, Problem 3VCQ
Figure 12.12 What ratio of offspring would result from a cross between a white-eyed male and a female that is heterozygous for red eye color?
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This illustration shows the F2 phenotypes from a monohybrid cross in snapdragons. What type of inheritance produces such an outcome?
incomplete dominance
multiple alleles
continuous variation
complete dominance
epistasis
Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are dominant to green (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares would you need to complete a Punnett square analysis of this cross?
Pink flower color is the result of an incompletely dominant gene in snapdragons, with red the dominant, and white, the recessive. If you cross two pink flowers, what percentage of pink flowers would you expect to see in the offspring? ____ % (just write numeral, no % sign)
Chapter 12 Solutions
Biology 2e
Ch. 12 - Figure 12.5 In pea plants, round peas (R) are...Ch. 12 - Figure 12.6 What are the genotypes of the...Ch. 12 - Figure 12.12 What ratio of offspring would result...Ch. 12 - Figure 12.16 In pea plants, purple flowers (P) are...Ch. 12 - Mendel performed hybridizations by transferring...Ch. 12 - Which is one of the seven characteristics that...Ch. 12 - Imagine you are performing a cross involving seed...Ch. 12 - Consider a cross to investigate the pea pod...Ch. 12 - A scientist pollinates a true-breeding pea plant...Ch. 12 - The observable traits expressed by an organism are...
Ch. 12 - A recessive trait will be observed in individuals...Ch. 12 - If black and white true-breeding mice are mated...Ch. 12 - The ABO blood groups in humans are expressed as...Ch. 12 - In a mating between two individuals that are...Ch. 12 - If the allele encoding polydactyly (six fingers)...Ch. 12 - A farmer raises black and white chickens. To his...Ch. 12 - Assuming no gene linkage, in a dihybrid cross of...Ch. 12 - The forked line and probability methods make use...Ch. 12 - How many different offspring genotypes are...Ch. 12 - Labrador retriever's fur color is controlled by...Ch. 12 - Which of the following situations does not follow...Ch. 12 - Describe one of the reasons why the garden pea was...Ch. 12 - How would you perform a reciprocal cross for the...Ch. 12 - Mendel performs a cross using a true-breeding pea...Ch. 12 - Calculate the probability of selecting a heart or...Ch. 12 - The gene for flower position in pea plants exists...Ch. 12 - Use a Punnett square to predict the offspring in a...Ch. 12 - Can a human male be a carrier of red-green color...Ch. 12 - Why is it more efficient to perform a test cross...Ch. 12 - Use the probability method to calculate the...Ch. 12 - Explain epistatis in terms of its Greek-language...Ch. 12 - In Section 12.3, ''Laws of Inheritance," an...Ch. 12 - People with trisomy 21 develop Down’s syndrome....Ch. 12 - A heterozygous pea plant produces violet flowers...
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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
Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are dominant to green (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares would you need to complete a Punnett square analysis of this cross?
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Figure 8.9 In pea plants, round peas (R) are dominant to wrinkled peas (r). You do a test cross between a pea plant with wrinkled peas (genotype rr) and a plant of unknown genotype that has round peas. You end up with three plants, all which have round peas. From this data, can you tell if the parent plant is homozygous dominant or heterozygous?
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You decide to breed a pair of guinea pigs, one black and one white. In guinea pigs, black fur is caused by a dominant allele (B) and white is due to homozygosity for a recessive allele (b) at the same locus. Your guinea pigs have seven offspring, four black and three white. What are the genotypes of the parents? Why is there a 1:1 ratio in this cross?
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In a cross, Aa Bb Cc Dd Ee x Aa Bb cc Dd ee, what proportion of offspring are expected to be homozygous recessive for all five genes? show your work.
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A man who is red-green color-blind marries a woman who is neither color-blind nor a carrier for this trait. Which statement would best describe their probable offspring?
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The illustration shows the F2 phennotypes from a monohybrid cross on snapdragons. What type of inheritance produces such an outcome?
multiple alleles
complete dominance
epistasis
incomplete dominance
continuous variation
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Use the following parents to create a Punnet Square and answer the question. Cross a heterozygous father with a homozygous recessive mother. (you can use the letter A for your parental genotypes)
What percent of the offspring will be homozygous recessive?
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Using the graph in Figure 11-20, determine how many offspring were involved in the hypothetical cross studying skin color. What percentage had the lightest skin possible? the darkest skin possible?
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In the hypothetical situation of pants and socks, which one of the offspring will be homozygous for color
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Below is a pedigree of a family with colorblindness. II-1 has a father who is colorblind, and II-1 and II-2 have another child, what is the chance that this child will be colorblind?
0
1/2
1/4
1/8
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What cross will result in a ratio of 3 dominant phenotype offspring for every 1 recessive offspring?
What cross will result in a 1:2:1 genotype ratio in the offspring?
What cross will result in all homozygous recessive offspring?
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In 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.
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