The broad-sense heritability of a trait is estimated at 0.8. If the total phenotypic variance is estimated at 32.20, what is the genetic variance?
What will be an ideal response?
VG = 25.76; broad-sense heritability = VG / VP
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What is the advantage to the sphinx moth Xanthopan morgani by having an 8-inch-long tongue?
A. It can be used to capture other flying insects for food. B. It is used to attract mates through sexual selection. C. It can reach nectar that no other pollinator can reach. D. It can only pollinate one type of flower. E. It makes flying more efficient.
In some plants, flowering is a _____ response
a. phototropic c. photoperiodic b. gravitropic d. thigmotropic
A hummingbird that pollinates morning glory
flowers and nests in the crotch of an apple tree. The apple tree is not harmed or helped by the hummingbird. The relationship between the hummingbird and the apple tree is a
a. mutualism. b. commensalism. c. competition. d. parasitism. e. predation
Which is NOT a chromosomal aberration?
a. deletion b. extra chromosomes c. translocation (exchange of parts between nonhomologs) d. crossing over e. fewer chromosomes