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Q1. A cross between a short-tailed mouse and a long-tailed mouse yields all short-tailed mice. Crosses among the F1 yield an F2 of 48 short-tailed mice and 22 long-tailed mice. Recommend a model (as in diagram the cross) to describe these results. Q2. The objective of the letter is to […]

If a DNA molecule containing the base sequence 5′ TACTAG 3′ unzipped during replication, and replication that occurred in the direction away from the replication fork (to right) proceeded in three-base sequences, what would be the FIRST three-base sequence to be formed? A. 5′ ATG 3′ B. 3′ ATC 5′ […]

Pyrethrum is an African plant that develops daisy-like flowers with white petals and yellow centers. The chemical pyrethrin is produced in large amounts in the flower buds. Pyrethrin is a very strong poison that shuts down the nervous system of insects. This chemical is used as spray to kill insects […]

Question: In humans the presence of chin and cheek dimples is dominant to the absence of dimples, and the ability to taste the compound PTC is dominant to the inability to taste the compound. Both traits are autosomal, and they are unlinked. The frequencies for dimples are D = 0.62 and […]