In humans, a trait that is “sex-linked”: a. is determined by a gene located on the 23rd chromosome b. appears more frequently in males than in females c. may be “carried” by females on one X chromosome but not the other d. All of these are true of sex-linked traits

In humans, a trait that is “sex-linked”: a. is determined by a gene located on the 23rd chromosome b. appears more frequently in males than in females c. may be “carried” by females on one X chromosome but not the other d. All of these are true of sex-linked traits

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Description: In humans, a trait that is “sex-linked”: a. is determined by a gene located on the 23rd chromosome b. appears more frequently in males than in females c. may be “carried” by females on one X chromosome but not the other d. All of these are true o

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter13: Patterns In Inherited Traits

Section: Chapter Questions

Problem 1SA: A heterozygous individual has _______ for a trait being studied. a. the same allele on both...

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A particular person is said to be a carrier of a genetic trait. What does this tell you about their phenotype? (a) They physically show the trait. (b) They physically show the trait more than a noncarrier would show the trait.(c) They are almost normal but show an intermediate phenotype for the trait. (d) They are completely normal and do not physically show the trait.
One form of the bleeding disorder known as von Willebrand disease is an autosomal recessive disease. A man who is a carrier marries a woman who is also a carrier of the disease. (a) What percentage of their children are likely to have a disease phenotype? (b) What percentage of their children are likely to have a normal phenotype? (c) What percentage of their children are likely to be carriers of the disease?
In man, the allele for normal color (A) is dominant to the allele for albinism (a). A normal man whose father was albino married a normal woman whose mother was albino. a. What are the chances that their first child will be albino? b. What are the chances their second child will be albino?
Identify genetic terms and basic principles of genetics as applied to blood groups, sex-linkage, and other inherited characteristics. a. Genetics b. Inheritance theory c. Sex-linked characteristics d. Linkage
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 chromosome
An example of a trait that results from a single dominant allele is _____. A.attached earlobes B.cystic fibrosis C.more frequent in its appearance D.polydactyly
Which of the following is indicated by roman numerals in a pedigree? a.Presence of the studied trait b.Generation c.Sex d.Marriage status Which of the following disorders in humans has an autosomal dominant inheritance pattern? a.Albinism b.Hemophilia c.Tay-Sachs disease d.Huntington’s disease For an X-linked recessive allele, what proportion of female offspring will be carriers in the cross of an affected father and a noncarrying mother? a.50 percent b.0 percent c.100 percent
In a multigenerational study of a family, 8% of the males and 8% of the females have red hair. What may be the cause of this? A)Autosomal inheritance B)Environmental influence C)Sex-linked inheritance D)Non-somatic inheritance
On occasion, a trait that appears to be autosomal is produced in unexpected ratios in male and female offspring. What is this an example of? A. codominance B. sex-linked genes C. multiple alleles D. amniocentesis
Baldness is a phenomenon where individuals lose hair as they grow older. As an X-linked recessive gene, what instances do females manifest this trait? a. heterozygous recessive b. heterozygous dominant c. homozygous recessive d. homozygous dominant
Baldness is a Sex Influenced Trait. A heterozygous bald man and a heterozygous nonbald woman plan to have two kids. What are the phenotypes for their kids? a.If both sons; they will all be bald. b.If both daughters; both will be bald. c.If both daughters; they will all be normal- nonbald. d.If male or female ; Either a bald or normal daughter and either a bald or normal son
Which of the following is false? a. the pollen grain shape was studied by Mendel. b. Mendel believed that the characteristics of pea plants were determined by the inheritance units or factors from both parents. c. An allele is one of several possible forms of a gene. d. When the genotype consists of a dominant and recessive allele, the phenotype will be like the dominant allele.

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		a. is determined by a gene located on the 23rd chromosome
		b. appears more frequently in males than in females
		c. may be “carried” by females on one X chromosome but not the other
		d. All of these are true of sex-linked traits