AP 15-16 Test Review
When Thomas Hunt Morgan crossed his red–eyed F1 generation flies to each other, the F2 generation included both red–and white–eyed flies. Remarkably, all the white–eyed flies were male. What was the explanation for this result?
Which of the following is the meaning of the chromosome theory of inheritance as expressed in the early 20th century?
In cats, black fur color is caused by an X–linked allele; the other allele at this locus causes orange color. The heterozygote is tortoiseshell. What kinds of offspring would you expect from the cross of a black female and an orange male?
Red-green color blindness is a sex-linked recessive trait in humans. Two people with normal color vision have a color-blind son. What are the genotypes of the parents?
Normally, only female cats have the tortoiseshell phenotype because
In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?
Sex determination in mammals is due to the SRY region of the Y chromosome. An abnormality of this region could allow which of the following to have a male phenotype?
What is the reason that linked genes are inherited together?
In humans, male–pattern baldness is controlled by an autosomal gene that occurs in two allelic forms. Allele Hndetermines nonbaldness, and allele Hbdetermines pattern baldness. In males, because of the presence of testosterone, allele Hbis dominant over Hn. If a man and woman both with genotype HnHbhave a son, what is the chance that he will eventually be bald?
It became apparent to Watson and Crick after completion of their model that the DNA molecule could carry a vast amount of hereditary information in which of the following?
Replication in prokaryotes differs from replication in eukaryotes for which of the following reasons?
How does the enzyme telomerase meet the challenge of replicating the ends of linear chromosomes?
The leading and the lagging strands differ in that
What is the role of DNA ligase in the elongation of the lagging strand during DNA replication?
Which enzyme catalyzes the elongation of a DNA strand in the 5' 3' direction?
YOU WILL HAVE 3 PEDIGREE QUESTIONS.
YOU WILL HAVE A QUESTION WHERE YOU HAVE TO WRITE OUT THE COMPLEMENTARY SIDE OF A DNA CHAIN
Discuss Mendel’s laws of segregation and independent assortment. Explain how the events of meiosis I account for the observations that led Mendel to formulate these laws.