According to Mendel, if a male that is homozygous for the dominant form (PP) of a trait is crossed with a female that is homozygous for the recessive (pp) form of a trait, all offspring will show the ____ form of the trait.
A. sex-linked
B. dominant
C. recessive
D. codominant
E. lethal
Answer: B
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In a(n) hydrostatic skeleton, the force of muscle contraction is applied against a rigid, external body covering
Indicate whether the statement is true or false.
What is the hygiene hypothesis?
A. People who have more exposure to infectious agents will have an overactive immune system. B. People who have less exposure to infectious agents will have an overactive immune system. C. People who have better hygiene and are cleaner will have a weaker immune system. D. People who have better hygiene and are cleaner will have more infections. E. People who have better hygiene and are cleaner will have fewer infections.
In ____, fertilized eggs from a rare species may be implanted in a related and less rare species
a. host mothering b. captive breeding c. artificial insemination d. commercial harvesting e. sperm banking
How might a single base substitution in the sequence of a gene affect the amino acid sequence of a protein encoded by the gene, and why?
A) Only a single amino acid could change, because the reading frame is unaffected. B) The amino acid sequence would be substantially altered, because the reading frame would change with a single base substitution. C) All amino acids following the substitution would be affected, because the reading frame would be shifted. D) It is not possible for a single base substitution to affect protein structure, because each codon is three bases long.