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How many different kinds of gametes can be produced by an individual with the
genotype AABbCCddEeFf?
What does the term genetics mean?
Three loci, mitochondrial malate dehydrogenase that forms a and b (MDHa, MDHb),
glucuronidase that forms 1 and 2 (GUS1, GUS2), and a histone gene that forms + and
(H+, H), are located on chromosome #7 in humans. Assume that the MDH locus is at
position 35, GUS at position 45, and H at position 75. A female whose mother was
homozygous for MDHa, GUS2, and H+and whose father was homozygous for MDHb,
GUS1, and Hproduces a sample of 1000 egg cells. Give the genotypes and expected
numbers of the various types of cells she would produce. Assume no chromosomal
interference.
What is the meaning of the term endosymbiotic theory?
Assume that there are 12 map units between two loci in the mouse and that you are able
to microscopically observe meiotic chromosomes in this organism. If you examined 200
primary oocytes, in how many would you expect to see a chiasma between the two loci
mentioned above?
What is the composition of a Barr body?
Name the individual who, while working with the garden pea in the mid-1850s,
demonstrated quantitative patterns of heredity and developed a theory involving the
behavior of hereditary factors.
What is meant by the term antiparallel?
Assume that the somatic cells of a male contain one pair of homologous chromosomes
(e.g., AaAb), and an additional chromosome without a homolog (e.g., W). What
chromosomal combinations would be expected in the meiotic products (spermatids) of a
single primary spermatocyte? (There may be more than one answer.)
A procedure that is often used to separate molecules by using their molecular charges is
called ________.
Individuals have been identified who have two different karyotypes, such as 45, X/46,
XY or 45, X/46, XX. Such individuals are called ________.
A certain type of congenital deafness in humans is caused by a rare autosomal dominant
gene. In a mating involving a deaf man and a deaf woman (both heterozygous), would
you expect all the children to be deaf? Explain your answer.
What advantage does BrdU (bromodeoxyuridine) have in the study of chromosome
structure and recombination?
Assume that a Chi-square test provided a probability value of 0.02. Should the null
hypothesis be accepted?
What is meant by the term cotransformation?
