Which of the following is a true statement?

A. A cross between Bb and bb genotypes would lead to offspring with a 1:4 phenotypic ratio.
B. An example of a homozygous individual is Bb.
C. You may associate pedigrees with purebred animals, such as purebred dogs, but pedigrees cannot represent human matings.
D. A testcross is a mating between an individual with a dominant phenotype (but unknown genotype) and a homozygous recessive individual.


D. A testcross is a mating between an individual with a dominant phenotype (but unknown genotype) and a homozygous recessive individual.

Biology & Microbiology

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When two different species require the same resources we may observe

a. intraspecific competition. b. resource partitioning. c. interspecific competition. d. predation. e. symbiosis/parasitism.

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It is estimated that ____ tons of plastic enter the ocean annually

a. 500 b. 500 thousand c. 1 million d. 10 million e. 100 million

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For roundworms living in the intestine of a

vertebrate, the cuticle most probably serves in what capacity? a. water retention b. nutrient absorption c. protection from digestive enzymes d. excretion of metabolic wastes e. sensory detection

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Would you expect desert plants to have a thin or thick cuticle?

A) thin because desert plants do not have stomata B) thin because desert plants have a short root system C) thick because desert plants have an extensive shoot system D) thick because desert plants need to retain water in this dry environment

Biology & Microbiology