Imagine that you are performing a cross involving seed texture in garden pea plants. You cross true-breeding round and wrinkled parents to obtain F1 offspring. Which of the following experimental results in terms of numbers of plants are closest to what you expect in the F2 progeny?
a) 810 round seeds
b) 810 wrinkled seeds
c) 405:395 round seeds:wrinkled seeds
d) 610:190 round seeds:wrinkled seeds
Ans: d) 610:190 round seeds:wrinkled seeds
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Which hormone regulates milk production in mammals and salt and water balance in other vertebrates?
A. growth hormone B. prolactin C. thyroid-stimulating hormone D. adrenocorticotropic hormone E. luteinizing hormone
According to the out-of-Africa hypothesis for the evolution of Homo sapiens, modern humans evolved in Africa, Asia, and Europe simultaneously.
Indicate whether the statement is true or false.
The characteristics maximize the fitness of an individual under one set of environmental conditions generally limit its fitness under a different set of conditions
Indicate whether the statement is true or false
A lizard with a striped tail and a normal head crossed with one having a normal tail and a spotted head produce all
normal (no stripes or spots) F1 progeny. What progeny would be expected to be produced by mating either of the parental lizards with another that had a striped tail and spotted head, if the genes conferring stripes and spots were close together on the same chromosome? a. equal numbers of normal, striped, spotted and striped, and spotted b. 3 striped : 1 spotted c. mostly progeny that are striped or spotted d. mostly progeny that are normal or striped and spotted e. 9 normal : 3 striped : 3 spotted : 1 striped and spotted