Identical twins can result from ____
a. the fusion of two sets of identical gametes
b. a division of a zygote into two separate cells that develop into two separate embryos
c. the fusion of two paternal gametes with a single maternal gamete that then divides
d. a lack of chromosomal separation during meiosis resulting in gametes that are diploid
e. a mechanism that is not understood
ANSWER: b
You might also like to view...
Most chytrids are ____
a. saprobes in soil b. parasites of plants c. symbiotic partners of cattle d. parasites of animals e. aquatic
In a translocation, all of the DNA is present, and there is only one copy of each piece.
Answer the following statement true (T) or false (F)
The part of a neuron that contains a nucleus and other organelles typical of cells is the ________
Fill in the blank(s) with correct word
Some flowers have distinctive patterns that only reflect ultraviolet light and therefore are invisible to humans. Which statement about such markings is not correct?
A. Flowers with ultraviolet patterns usually appear yellow or orange to humans. B. Carotenoid pigments are responsible for the ultraviolet patterns. C. The ultraviolet patterns are highly visible and attractive to bees. D. The ultraviolet patterns repel birds and bats from the flowers. E. The ultraviolet patterns often form a conspicuous central bull's eye or identify the best landing sites.