What is a testcross?

A. any genetics cross you see on an exam
B. a cross between two organisms of different species
C. a cross between an organism of unknown genotype with a homozygous recessive individual
D. any genetics cross you do in a lab or an abbey garden
E. a cross between two true-breeding individual (such as we see in the P generation)


Answer: C

Biology & Microbiology

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a. moderate; unnecessary b. moderate; vital c. small; unnecessary d. large; unnecessary e. small; vital

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What will be an ideal response?

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To obtain large, flat cookies, one should use more fat in a recipe

Indicate whether the statement is true or false

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Two parents with type A blood have a child who is type O. The parents' genotypes must be

____________________ and ____________________ or they must have the ____________ phenotype. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology