The sperm in the figure below were most likely produced by:
a. nondisjunction.
b. mutation.
c. X-linkage.
d. translocation.
e. normal meiosis
A
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Which strains' mutations represent a complementation group?
Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A-H). In each strain, the white eye trait is due to an autosomal recessive allele. It is possible that all seven strains have mutations in the same gene. Alternatively, some or all of the strains may have mutations in different genes. To determine how many genes are involved in eye color in these flies, all possible pairwise crosses are performed. The offspring phenotypes resulting from each cross are observed. (+ = wild-type; ? = mutant)
A) C, D, F
B) A, B
C) E
D) A, B, E, G, H
Dreaming occurs
a. after the first 15 minutes of sleep. b. after the first 30 minutes of sleep. c. after the first 45 minutes of sleep. d. during REM sleep. e. any time an individual is sleeping.
Arrange the following molecules in order with respect to their relative levels of oxidation (assign 5 to the most oxidized and 1 to the most reduced)
_______ CH2O (formaldehyde) _______ CH4 (methane) _______ CHOOH (formic acid) _______ CH3OH (methanol) _______ CO2 (carbon dioxide) Fill in the blank(s) with correct word
Trout and amoebas are both heterotrophs, and can inhabit similar environments (for example, a freshwater pond). However, these organisms are very different when it comes to their shape and size. Why?
A. Trout and amoebas utilize different sources of CO2. B. Trout and amoebas utilize different sources of C6H12O6 (or other organic compounds). C. Trout and amoebas utilize different sources of O2. D. Trout and amoebas have different metabolic pathways. E. Trout and amoebas are exposed to different environmental conditions, even when they inhabit the same pond.