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.
C
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The organ system that is responsible for transporting nutrients, gases, hormones, and antibodies for immune response.
A) Muscular
G) Respiratory
B) Reproductive
H) Skeletal
C) Digestive
I) Nervous
D) Cardiovascular
J) Endocrine
E) Integumentary
K) Lymphatic
F) Urinary
Which has an unusual characteristic in that their circular DNA does not have genes for making the proteins needed to
replicate and produce new viruses? a. viroid b. retroviruses c. bacteriophages d. pandoraviruses e. polydnaviruses
In which phase of meiosis I do homologues separate?
A) metaphase I B) anaphase C) prophase II D) anaphase I
A population's intrinsic rate of increase can be calculated by:
A) multiplying r by K. B) subtracting r from K. C) multiplying r by the initial population size, N. D) subtracting birth rate from death rate.