Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 12.1, Problem 1SB
Two pairs of traits are segregating in a cross. Two parents produce 156 progeny that fall into 4
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Which of the following terms is used to describe the offspring of a cross of two true-breeding parents that differ in one or more traits?
Pure line
Homozygous
Reciprocal
Hybrid
A breeder performed a testcross to find out if his male dog was a purebred black. He got one brown puppy and seven black puppies, did he have the purebred? (explain) What was the genotype of the female dog he used in test cross (BB), (Bb), or (bb)? (explain)
A heterozygous purple bird was crossed with a blue-feathered bird. One white-feathered offspring resulted from the cross. What is the genotype of the blue-feathered bird?
(3 marks - 2 marks for the correct genotype with an explanation as to how you determined your answer, 1 mark for the Punnett square)
Chapter 12 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 12.1 - Two pairs of traits are segregating in a cross....Ch. 12.1 - If, instead, the four phenotypes in question 1...Ch. 12.2 - Palomino horses have a golden coat color, with a...Ch. 12.2 - A true-breeding rabbit with agouti (mottled,...Ch. 12 - The dominant C allele of a gene that controls...Ch. 12 - In peas, the allele Le produces tall plants and...Ch. 12 - Prob. 3TYKCh. 12 - What genotypes, and in what frequencies, will be...Ch. 12 - In addition to the two genes in problem 4, assume...Ch. 12 - Prob. 6TYK
Ch. 12 - In cats, the genotype AA produces tabby fur color;...Ch. 12 - Prob. 8TYKCh. 12 - The ability of humans to taste the bitter chemical...Ch. 12 - A man is homozygous dominant for alleles at 10...Ch. 12 - In guinea pigs, an allele for rough fur (R) is...Ch. 12 - Prob. 12TYKCh. 12 - Some recessive alleles have such a detrimental...Ch. 12 - In chickens, feathered legs are produced by a...Ch. 12 - A mix-up in a hospital ward caused a mother with O...Ch. 12 - Having malformed hands with shortened fingers is a...Ch. 12 - Prob. 17TYKCh. 12 - Design an Experiment Imagine that you are a...Ch. 12 - Prob. 19TYKCh. 12 - Prob. 1ITDCh. 12 - Prob. 2ITDCh. 12 - Half of the worlds population eats rice at least...
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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 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?arrow_forwardIn tomatoes, red fruit is dominant to yellow fruit, and purple stems are dominant to green stems. The progeny from one mating consisted of 305 red fruit, purple stem plants; 328 red fruit, green stem plants; 110 yellow fruit, purple stem plants; and 97 yellow fruit, green stem plants. What were the genotypes of the parents in this cross? Explain how you arrived at your answers.arrow_forwardYou crossed two true-breeding lines of violet-flowered and white-flowered peas. Is it possible to establish a true-breeding line of the genotype found in the offspring of your cross? Why or why not?arrow_forward
- What is the probability of producing a child that will phenotypically resemble either one of the two parents in the following two crosses?a. Aa Bb Cc Dd × aa bb cc ddb. aa bb cc dd × AA BB CC DDarrow_forwardIn snapdragons, heterozygotes for one of the genes have pink flowers, whereas homozygotes have red (R) or white (r) flowers. When plants with red flowers are crossed with plants with white flowers, what proportion/probability of the offspring will have pink flowers? Create a Punnett square.arrow_forwardIn a dihybrid cross, if two heterozygous individuals for both genes are crossed, what will be the expected phenotypic ratios? (In the following order: dominant for both traits; dominant for the first trait recessive for the second; recessive for the first trait and dominant for the second; recessive for both traits) show your solution using punnet squarearrow_forward
- In a pedigree, which of the following shapes indicates a male individual? Circle Square Diamondarrow_forwardIf you did an experimental cross and got 1152 individual offspring, how many of those offspring would have to be yellow to have a 3:1 (Yellow: green) ratio from the cross?arrow_forwardIn the same cross as question #1, what fraction of the offspring will have their father's genotype for both traits?arrow_forward
- 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?arrow_forwardA test was done to determine the biological father of a child. The child's blood type is A and the mother's is B. The first man has a blood type of O, while the second has a blood type of AB. Which among the two men could possibly be the biological father? Use a cross of various genotypes. Identify the Following: Offspring’s possible genotype? Parent 1’s possible genotype? Parent 2’s possible genotype? Possible cross?arrow_forward. Which of the following terms is used to describe the offspring of a cross of two true-breeding parents that differ in one or more traits? A) Hybrid B) Pure line C) Homozygous D) Reciprocalarrow_forward
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