You mate two pea plants that are both AaBb and get a 3:1 phenotype ratio. This suggests
A. crossing-over occurred.
B. independent assortment occurred.
C. genes A and B are on different chromosomes.
D. nondisjunction occurred.
E. genes A and B are linked on the same chromosome.
E. genes A and B are linked on the same chromosome.
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Penicillin affects the synthesis of phospholipids, thereby producing weak membranes and lysis of the bacteria
Indicate whether this statement is true or false.
Which organism would be most likely to be able to survive rapid global climate change?
A. a bird that lives north of the Arctic Circle B. a salamander that inhabits high elevations C. a fish species that depends on coral reefs for food and shelter D. a tree species with bird-dispersed seeds E. an insect that can feed upon many different plant species
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative. Which of the following is a possible phenotype for the father?
A) A negative B) O negative C) B positive D) AB negative
Which of the following do carrier proteins often transport?
a. proteins b. steroid hormones c. H2O d. glucose and amino acids