What is the term for crosses between parents that differ in only one trait?
A) Testcrosses
B) Cross fertilize
C) Monohybrid crosses
D) Dihybrid crosses
E) Reciprocal crosses
C) Monohybrid crosses
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Transgenic organisms are used to clarify which gene may be responsible for a mutant phenotype because
A) individuals with a mutant phenotype can carry mutations in more than one gene. B) the genes that cause diseases are always dominant. C) the genes that cause diseases are always recessive. D) strains used to create transgenic organisms carry no mutations and all their genes are wild-type.
Which of these melanomas displays rapid and invasive growth, and can be fatal if not removed at an early stage of development?
1.1 only
2.2 only
3.3 only
4.both 2 and 3
5.all of the choices
Mitosis and meiosis are important processes for the survival of many animal species. If a horse's diploid number is 64, how many more chromosomes would a daughter cell produced by mitosis have than a daughter cell produced by meiosis?
A) 64 B) 32 C) 16 D) 128
Which microscope bombards a whole, metal-coated specimen with electrons moving back and forth over it?
A. scanning electron B. differential interference contrast C. fluorescence D. phase-contrast E. transmission electron