Specific segments of DNA that are the functional units of inheritance are called ________
A) chromosomes
B) genes
C) chromatids
D) telomeres
B
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Influencing the philosophy and analysis of many systematists in the mid-1900s, ____ published “Phylogenetic
Systematics,” arguing that classifications should be based solely on evolutionary relationships.
a. Carolus Linnaeus b. Willi Hennig c. Gregor Mendel d. Charles Darwin e. Ernst Mayr
In some fruit flies, an inversion involving the white-eyed locus (w) moves the w+gene from one end of the X chromosome to a location nearer to the centromere. Flies with a w+ or w+/w genotype are normally expected to have red eyes
However, in flies with the inversion, the eyes are mottled red and white. Explain why.
What leads to an individual having too many or two few chromosomes?
A) Crossing over B) Independent assortment C) Homologous recombination D) Nondisjunction
Which growth response causes the shoots of a plant grown in the dark to grow upward?
A) phototropism B) thigmotropism C) gravitropism