Exam 29: Heredity

Match the following: -Inherited traits determined by genes on the X or Y chromosomes.

Match the following: -Inheritance of the ABO blood group type is an example of this type of inheritance.

Figure 29.2 Use Figure 29.2 to answer the following: -Identify,by numbers,any known carriers.

A couple whose blood types are A (IAi)and B (IBi)may have a child with which of the following blood types?

Figure 29.2 Use Figure 29.2 to answer the following: -Are there any afflicted females?

Match the following: -Genes not expressed unless they are present in homozygous condition.

Gene mutations in the sex chromosomes of the human would tend to become visibly expressed ________.

Of the different sources of genetic variability which on could be defined as permanent,transmissible changes to the DNA coding sequence that are often caused by outside environmental factors?

Hemophilia is an X-linked condition caused by a recessive gene.

Recessive alleles are best defined as ________.

The X and Y chromosomes are considered the ________ chromosomes.

Genetic segregation implies that the members of the allele pair determining each trait are distributed to different gametes during mitosis.

Genetic variation results from the crossing over and exchange of chromosomal parts that occur during meiosis II.

Match the following: -Genes for the same trait that have different expressions.

Match the following: -Actual genetic makeup.

A nurse is providing genetic counseling to a couple who both have the sickle-cell anemia trait,but not the disease.The couple is trying to decide whether or not to have a child.What is the possibility that a child would inherit the disease? What is one reason they might consider not having a child?

What possible genotype(s)could the second-generation,fuzzy-longhaired individuals possess?

The folk singer,Woody Guthrie,died of Huntington's chorea.One of his parents also died of this disease affecting the nervous system.The disease usually affects carriers between 25 and 45 years of age and is inherited as a Mendelian autosomal dominant trait.Using Punnett squares,determine the probability that any of the three Guthrie offspring will have this devastating disease.

Match the following: -Situation in which an individual has identical alleles for a particular trait.

A 40-year-old pregnant woman is concerned about possible genetic defects in her unborn fetus.Her physician recommends prenatal testing and advises her of two methods.Compare and contrast amniocentesis with chorionic villus sampling relative to the time each can be performed,and the relative advantages and disadvantages of each.