In Mendel's pea plants, the genes that code for flower color, seed color and seed shape are on 3 different chromosomes. For flower color, purple is dominant over white, yellow seeds are dominant over green and round seeds are dominant over wrinkled seeds. If you crossed two parents who were heterozygous for all 3 genes, how many purple flowered, round and yellow seeded plants would you expect in the offspring generation?
a) 9/64
b) 1/64
c) 27/64
d) 3/64
Answer: c) 27/64
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Which of the following statements about the cell cycle is correct?
A. The cell cycle is a sequence of replications and divisions that produces a new cells. B. The phases of the cell cycle are G1, S, and M phases. C. In actively dividing cells, the S and G2 phases are collectively known as interphase. D. When the S phase of the cell cycle is finished, a cell has twice as many chromatids as the number of chromosomes in the G1 phase. E. During G2 phase, the cell grows and copies its chromosomes in preparation for cell division.
A human egg can only be fertilized in the ____
a. oviduct b. ovary c. uterus d. cervix e. vagina
What is the net movement of molecules from an area of higher concentration to an area of lower concentration?
a. Osmosis b. Diffusion c. Redox-reaction d. Electron transfer chain e. Metabolic pathway
Reproductive isolation in Darwin's finches was studied by Podos. He measured beak size and found a correlation between this and the finches'
A. song and ability to attract certain mates. B. flight patterns and song. C. ability to attract certain mates. D. flight patterns. E. song.