A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and to lie in the grooves between larger, underlying cells. If we were to separate these eight cells and attempt to culture them individually, then what is most likely to happen?
Answer: Each cell may continue development, but only into a nonviable embryo that lacks many parts.
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The process of mating between genetically unrelated individuals is called inbreeding
Indicate whether the statement is true or false
If an organism with a particular genotype fails to produce the corresponding phenotype, the organism is said to be ________ for the trait
Fill in the blank(s) with correct word
The spines of a cactus are actually modified:a
branches. b. stems. c. leaves. d. roots. e. trichomes
Many insects, like moths and flies, undergo complete metamorphosis. What would you predict about gene expression in these two kinds of insects?
A. The same genes are expressed at each stage, but the age and number of cells accounts for the minor morphological differences. B. The basic organization of homeotic genes is the same in both larvae and adult, but the expression of some other genes must be different. C. Completely different sets of genes must be used in the development of larvae and the adult. D. The order of homeotic genes along the body axis must be different in larvae and adult.