Exam 4: The Chromosome Theory of Inheritance

Red green color blindness is controlled by an X chromosomal gene in humans.A normal man and normal woman whose fathers are both color blind marry.What is the probability that their first child will be color blind?

In human oogenesis, how many chromosomes does a primary oocyte carry?

A white-eyed female fruit fly is mated to a red-eyed male.One of their progeny is a white-eyed female.What is the likely karyotype of this white-eyed daughter?

An XY individual carries mutations in both the SRY and AR genes.Which anatomic sex is this individual expected to be?

Males with one copy of an X-linked gene are said to be _________ for that gene.

A cell with three pairs of chromosomes has the genotype AaBbCc, such that each pair of alleles is on a different pair of chromosomes.If this cell were to undergo meiotic division, how many genetically different types of gametes could be produced?

The stage of mitosis when sister chromatids separate from each other and migrate to opposite poles of a cell is called

In the following pedigree, the indicated trait is caused by which type of allele?

In fruit flies, an X-linked dominant mutation (N) causes Notch wings in heterozygous females but is lethal in hemizygous or homozygous condition.What ratio of offspring would be observed in a cross of a Notch female with a normal male?

During which of the following stages of the cell cycle would a chromosome consist of only a single chromatid?

What aspect of chromosome behavior most clearly accounts for Mendel's law of independent assortment?

A cross between a white-eyed female fruit fly and a red-eyed male would generate which of the following types of progeny?

The following is a list of mitotic events in no particular order.A Chromosomes align on the midplate of the cell.B Kinetochores begin attaching to spindle fibers.C Nuclear membrane reforms and chromosomes decondense.D Chromosomes condense and centrosomes migrate to opposite sides of nucleus.E Sister chromatids separate and move to opposite poles.What is the correct order of events?

Which of the following events occurs during mitosis but not during meiosis?

In chickens, it is the females that have two different sex chromosomes (Z and W) while the males have two Z chromosomes.A Z-linked gene controls the pattern of the feathers, with the dominant B allele causing the barred pattern and the b allele causing non-barred feathers.From which of the following crosses would all of the daughters be of one type (barred or non-barred) and all of the sons the other type?

Which of the following are the structures that appear along the synaptonemal complex during pachytene and are where parts between nonsister chromatids are exchanged?

In humans, XO individuals are females with Turner's syndrome and XXY individuals are males with Klinefelter syndrome.Which of the following events may not give rise to a Klinefelter male?

A cell with three pairs of chromosomes has the genotype AaBbCc, such that each pair of alleles is on a different pair of chromosomes.If this cell were to undergo mitotic division, how many genetically different types of gametes could be produced?

Individuals with Turner syndrome have which of the following sex chromosome complements?

The cells in which meiosis occurs in males are referred to as