Which organelle migrates during M phase to form the two opposite poles of the dividing cell and acts as the source of the spindle fiber microtubules?
A) centromere
B) kinetochore
C) centrosome
D) chiasmata
E) chromosome
C
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What observation by Thomas Hunt Morgan led to the understanding that genes were on chromosomes?
A. The white-eyed trait was recessive and disappeared in the F1 generation. B. In a cross of a red-eyed female and a white-eyed male, only females in the F2 generation were white-eyed. C. The inheritance of the white-eyed trait in fruit flies followed the same pattern of inheritance as that of the X chromosome. D. The inheritance of the white-eyed trait in fruit flies followed the same pattern of inheritance as that of the Y chromosome. E. Inheritance of the white-eyed trait was the same for female and male flies.
The theory of chromosomal inheritance was first proposed by
A. Mendel. B. Morgan. C. Sutton. D. Knight. E. Stern.
The male sage grouse who is "displaying" is likely _____.
A. indicating that he is ready to spar with other males B. claiming part of the territory as his own C. attracting a mate in a monogamous union D. attracting mates in a polygamous union E. indicating that he has won a mate
Oogenesis does not go on to completion unless
What will be an ideal response?