Campbell Essential Biology (6th Edition) - standalone book
6th Edition
ISBN: 9780133917789
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece, Kelly A. Hogan
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 2SQ
Which of Mendel’s laws is represented by each statement?
- a. Alleles of each pair of homologous chromosomes separate independently during gamete formation.
- b. Alleles segregate during gamete formation; fertilization creates pairs of alleles once again.
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Part 3: Use homologous chromosomes marked with alleles “A” and “a” and a second pair of homologs marked with alleles “B” and “b”. to demonstrate Mendel’s Principle of Independent Assortment in cells in Meiosis. Indicate what phase this happens in meiosis.
Part 4: Use AaBb x AaBb and two Punnett squares to demonstrate Mendel’s Principle of Independent Assortment. Write the expected phenotypic ratios under each Punnett square. Now, multiply the probabilities of each event to get combined probabilities for BOTH genes. i.e. the chance of being homozygous recessive for both genes is 1/4 x 1/4 =1/16.
Mendel's observation of the random distribution of two different traits from parents to offspring (giving the 9:3:3:1 ratio of phentypes) was due to
A. The random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I.
B. The random nature of the fertilization of ova by sperm.
C. The random distribution of the sister chromatids to the two daughter cells during anaphase II.
D. The relatively small degree of homology shared by the X and Y chromosomes.
Suppose a woman with blood type O married a man with blood type AB. What phenotypes and genotypes would you expect to observe in their offspring, and in what proportions? Answer the same question for a heterozygous mother with blood type A and a heterozygous father with blood type B.
Chapter 9 Solutions
Campbell Essential Biology (6th Edition) - standalone book
Ch. 9 - The genetic makeup of an organism is called its...Ch. 9 - Which of Mendels laws is represented by each...Ch. 9 - Edward was found to be heterozygous (Ss) for the...Ch. 9 - Whether an allele is dominant or recessive depends...Ch. 9 - Prob. 5SQCh. 9 - Prob. 6SQCh. 9 - Prob. 7SQCh. 9 - Prob. 8SQCh. 9 - Adult height in people is at least partially...Ch. 9 - A purebred brown mouse is repeatedly mated with a...
Ch. 9 - How could you determine the genotype of one of the...Ch. 9 - Tim and Jan have freckles (a dominant trait), but...Ch. 9 - Incomplete dominance is seen in the inheritance of...Ch. 9 - Why was Henry VIII wrong to blame his wives for...Ch. 9 - Both parents of a boy arc phenotypically normal,...Ch. 9 - Heather was surprised to discover that she...Ch. 9 - Prob. 17SQCh. 9 - In 1981, a stray cat with unusual curled-back ears...Ch. 9 - Prob. 19PSCh. 9 - There are now nearly 200 recognized breeds of dog,...Ch. 9 - Gregor Mendel never saw a gene, yet he concluded...Ch. 9 - Prob. 22BS
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- Assume that one of Merida's sons, who is heterozygous for orange hair color, married a girl that was also heterozygous. Create a Punnett square to show the possibilities that would result if they had children. a. List the possible genotypes and phenotypes for their children. b. What are the chances of a child with orange hair? c. What are the chantes of a child with yellow?arrow_forwardThe pea plants used in Mendel’s genetic inheritance studies were diploid, with 14 chromosomes in somatic cells. Assuming no crossing over events occur, how many unique gametes could one pea plant produce? a. 28 b. 128 c. 196 d. 16,384arrow_forward50 Mendel formulated his Law of Segregation after he had: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a studied F1 offspring b studied F2 offspring C produced mutations identified chromosomesarrow_forward
- How do events in meiosis explain each of Mendels two laws?arrow_forwardin humans brown eyes (B) are dominant over blue (b).A brown eye man marries a blue-eyed woman and they have three children , two of whom are brown eyed and one of whom is blue eyed.Draw the punnett square that illustrate this marrage.what is the man's genotype ? what are the genotype of the children?arrow_forwardSuppose that a woman having normal vision and a man having normal vision have a son who is colorblind.What is the probability that their second child will be a colorblind girl?arrow_forward
- Give typing answer with explanation and conclusionarrow_forwardIn humans, having dimpled cheeks is dominant to non-dimpled cheeks. Is it possible that two dimpled adults have a non-dimpled child? Use a Punnett square to explain your answer. If it is possible, what is the probability of this occurring?arrow_forwardCurly hair (C) is dominant to straight hair (c). Is it possible for a curly haired man to produce curly haired children if his wife has straight hair? Explain your answer based on a Punnett square.arrow_forward
- Explain how Mendelssohn laws are related to meiosisarrow_forwardIn a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what is the expected outcome? a. all white-eyed male offspring b. all white-eyed female offspring c. all red-eyed offspring d. half white-eyed make offspringarrow_forwardMendel performs a cross using a true-breeding pea plant with round, yellow seeds and a true- breeding pea plant with green, wrinkled seeds. What is the probability that offspring will have green, round seeds? Calculate the probability for the F1 and F2 generations.arrow_forward
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