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.

Biology & Microbiology

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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.

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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

Biology & Microbiology

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

Biology & Microbiology

Which of the following do carrier proteins often transport?

a. proteins b. steroid hormones c. H2O d. glucose and amino acids

Biology & Microbiology