In a cross between two tall plants with yellow seeds that are heterozygous on both traits (TtYy), suppose Mendel discovered that a small number of offspring (5-6%) from these parents were short and green (ttyy). What does this say about the T and Y genes?
a. One is dominant over the other.
b. They sort independently of each other.
c. They are pleiotropic.
d. They produce polygenic effects.
e. They are codominant alleles of each other.
Ans: b. They sort independently of each other.
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A research laboratory is attempting to collect the content of human red blood cells. The type of solution researchers should use to cause blood cells to lyse (burst) would be
A. hyperosmotic. B. isosmotic. C. hypoosmotic. D. osmotic. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about osmotic concentration? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Mendel's work on inheritance had an immediate influence on the scientific community and theories of inheritance
Indicate whether the statement is true or false
Answer the following statements true (T) or false (F)
1. Two species that occupy identical realized niches will not be able to co-exist for an extended period of time. 2. Chemical defenses are found only among animals. 3. The mimicry of coral snakes by scarlet king snakes is an example of Batesian mimicry. 4. Fleas are endoparasites.
What is the waxy substance suberin typically associated with?
a. root hairs b. tonoplasts c. endodermis d. pericycle