Mastering Biology with Pearson eText -- ValuePack Access Card -- for Campbell Biology: Concepts & Connections
8th Edition
ISBN: 9780321928054
Author: Jane B. Reece, Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan
Publisher: PEARSON
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Chapter 9, Problem 3TYK
Edward was found to be heterozygous (Ss) for sickle-cell trait. The alleles represented by the letters S and s are
a. linked.
b. on homologous chromosomes.
c. both present in each of Edward’s sperm cells.
d. on the same chromosome but far apart.
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Students have asked these similar questions
Why is there no trait (letter) on the y chromosome for males in this pedigree?
A. Because the trait is X-linked (on the X chromosome)
B. Because Ms. Premo made a mistake
C. Because we never write anything on the y chromosome
How is this trait inherited?
A.
The trait is epistatic.
B.
The trait is X-linked.
C.
The trait is dominant.
D.
The trait is recessive.
Suppose that two people having free earlobes start a family. Their first child has free earlobes and their sec- ond has attached earlobes.a. What are the genotypes of the parents? ________b. What is the genotype of their first child? ________c. What is the genotype of their second child? ________
Chapter 9 Solutions
Mastering Biology with Pearson eText -- ValuePack Access Card -- for Campbell Biology: Concepts & Connections
Ch. 9 - Connecting the Concepts 1. Complete this concept...Ch. 9 - Whether an allele is dominant or recessive depends...Ch. 9 - Edward was found to be heterozygous (Ss) for...Ch. 9 - Two fruit flies with eyes of the usual red color...Ch. 9 - A man with type B blood and a woman who has type A...Ch. 9 - Tim and Jan both have freckles (see Module 9.9),...Ch. 9 - Both Tim and Jan (problem 6) have a widows peak...Ch. 9 - In rabbits, black hair depends on a dominant...Ch. 9 - A fruit fly with a gray body and red eyes...Ch. 9 - A series of matings shows that the recombination...
Ch. 9 - A couple are both phenotypically normal, but their...Ch. 9 - Why do more men than women have colorblindness?Ch. 9 - In fruit flies, the genes for wing shape and body...Ch. 9 - Adult height in humans is at least partially...Ch. 9 - Heather was surprised to discover she suffered...Ch. 9 - In 1981, a stray black cat with unusual rounded,...Ch. 9 - SCIENTIFIC THINKING The breakthrough that led...
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- A recessive trait will be observed in individuals that are ________ for that trait. a. heterozygous b. homozygous or heterozygous c. homozygous d. diploidarrow_forwardIs it possible for a bald man and a nonbald woman to have a nonbald son and bald daughter? A. Yes, if the father is homozygous and the mother is heterozygous. B. Yes, if both parents are heterozygous. C. No, it is not possible. D. Yes, if the father is heterozygous and the mother is homozygous.arrow_forwardColor blindness in men is controlled by a recessive gene located on the X chromosome. Can a brother and sister with color blindness have another normal brother? A. Yes, if the mother is a carrier. B.Yes, if the mother is homozygous. C.Yes, if the father is heterogametic. D.Yes, if the father is a carrier.arrow_forward
- Which of the following CANNOT be true about the inheriteance the trait depicted in the pedigree diagram below? A. It is recessive B. It is dominant C. It is on the X chromosome D. It is recessive, and it is on the X chromosomearrow_forwardAunt Smiley has the cutest pointed ears (Pp) and would love to have all her children with pointed ears. What type of ears would her husband need to have in order for her to get her wish? Give the genotype and phenotype as part of your answer.arrow_forwardWhen crossing two fruit flies with red eyes, which is a dominant trait, half of the male offspring are born with white eyes, but none of the females are. What is this an example of? A. an autosomal recessive trait B. an autosomal dominant trait C. an X-linked recessive trait D. an X-linked dominant traitarrow_forward
- Why are males more prone to having x-linked recessive disorders?a. Because the y chromosome is smaller than the x chromosome. b. Because the y chromosome is weaker than the X chromosome c. Because there is a chromosome that will inhibit the eexpression of the defective gene. d. Because there is no other chromosome that will mask the other defective chromosomearrow_forwardWhen a chromosome is doubled, the two parts have... Group of answer choices A. the same genes and the same alleles B. different genes and different alleles C. the same genes but maybe not the same alleles D. the same alleles but maybe not the same genesarrow_forwardHeterozygous is when... Choose the right answer: a.) the alleles are different b.) the alleles are absent c.) the alleles are present d.) the alleles are the samearrow_forward
- Hemophilia is a disease caused by a recessive allele (h), which is found on the X chromosome, non-hemophilia is (H). A normal man marries a woman that is heterozygous for the trait. Give the genotypes and phenotypes of all possible offspring?arrow_forwardWhat conclusion about your genotype would you make if one of your siblings, but neither one of your parents, exhibited a recessive phenotype?arrow_forwardJim and Pam would like to have a baby, but they know that albinism (an autosomal recessive disease) runs in both of their families. They do a genetic test, and learn that they are both carriers of the disease allele. What is the chance that their baby will have albinism? hint: use a punnet square Group of answer choices 1. 1/4 2. 2/3 3. 1/2 4. 1/8 5. 1/16arrow_forward
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