Chapter 14

Constructing a pedigree is particularly useful when studying inheritance patterns in organisms that ____________ . a. produce many offspring per generation b. produce few offspring per generation c. have a very large chromosome number d. reproduce asexually e. have a fast life cycle

Pedigree analysis is necessary when studying human inheritance patterns because _________ . a. humans have more than 20,000 genes b. of ethical problems with experimenting on humans c. inheritance in humans is more complicated than it is in other organisms d. genetic disorders occur only in humans e. all of the above

A recognized set of symptoms that characterize a genetic disorder is a(n) _____________. a. syndrome b. disease c. abnormality

If one parent is heterozygous for a dominant allele on an autosome and the other parent does not carry the allele, any child of theirs has a ____________ chance of being heterozygous. a. 25 percent c. 75 percent b. 50 percent d. no chance; it will die

True or false? A son can inherit an X-linked recessive allele from his father.

A trait that is present in a male child but not in either of his parents is characteristic of __________ inheritance. a. autosomal dominant d. It is impossible to answer b. autosomal recessive \(\quad\) this question without c. X-linked recessive \(\quad\) more information.

Color blindness is a case of __________ inheritance. a. autosomal dominant c. \(X\) -linked dominant b. autosomal recessive d. X-linked recessive

A female child inherits one \(X\) chromosome from her mother and one from her father. What sex chromosome does a male child inherit from each of his parents?

Alleles for Tay-Sachs disease are inherited in an autosomal recessive pattern. Why would two parents with a normal phenotype have a child with Tay-Sachs? a. Both parents are homozygous for a Tay-Sachs allele. b. Both parents are heterozygous for a Tay-Sachs allele. c. A new mutation gave rise to Tay-Sachs in the child. d. b or \(c\)

The SRY gene gives rise to the male phenotype in humans (Sections 10.4 and 14.5 ). What do you think the inheritance pattern of \(S R Y\) alleles is called?

Nondisjunction may occur during _____________. a. mitosis c. fertilization b. meiosis d. both a and b

Nondisjunction can result in ____________. a. duplications c. crossing over b. aneuploidy d. pleiotropy

True or false? An individual may inherit three or more of each type of chromosome characteristic of the species, a condition called polyploidy.

Klinefelter syndrome (XXY) can be easily diagnosed by ____________. a. pedigree analysis c. karyotyping b. aneuploidy d. phenotypic treatment

Match the chromosome terms appropriately. ______polyploidy ______deletion ______aneuploidy ______translocation ______syndrome ______transposable element a. symptoms of a genetic disorder b. chromosomal mashup c. extra sets of chromosomes d. gets around e. a chromosome segment lost f. one extra chromosome