A botanist brings you a leaf from a previously unknown species of plant. The shape of the leaf is eerily similar to a human hand, as if you had put your own hand down on green construction paper, and traced its outline. Starting from the petiole, veins branch out into each ‘finger’ of the leaf, with numerous smaller veins branching off within each finger. What is the most specific description you can assign to this leaf form?
a. compound
b. palmately compound
c. simple
d. pinnately compound
c. simple
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In a person with the genotype XXY, we can tell that nondisjunction took place in the mother
A. true B. false
Molecules of extrachromosomal DNA are also known as:
A) Golgi bodies. B) lysosomes. C) plasmids. D) plastids.
A husband and wife are in the process of getting a divorce. During child-support hearings, the husband states that he should not pay child support as he feels that the child was actually fathered by one of the woman's various lovers. DNA restriction analysis was performed, with the results illustrated in the diagram below.
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The DNA of the husband in this case can be found in lane 3, whereas that of the suspected father is in lane 4. Based on this information,
A) the husband is definitely the child's father.
B) the husband is definitely not the child's father.
C) either man could be the father, and more tests are needed to discern paternity.
D) neither man in question is the child's biological father.
Highly condensed, transcriptionally inactive chromatin is called
a. euchromatin. b. heterochromatin. c. a chromatin domain. d. histone-containing chromatin.