Test Cross Definition and Purpose — NEET Biology
📚 Practice ConceptUsing the genotypes of this cross, can you give a general definition for a test cross?
Which of the following statements are correct regarding the F₂ generation of a dihybrid cross involving two independently assorting genes with complete dominance? S1: In the F2 generation of a dihybrid cross (e.g., RrYy x RrYy), there are 9 different genotypes. S2: The genotype Rryy appears with a frequency of 1/8 in the F2 generation. S3: The probability of obtaining an offspring with at least one dominant allele for both traits (R_Y_) in the F2 generation is 9/16. S4: The genotypic ratio of the F2 generation can be expressed as a product of two independent monohybrid genotypic ratios (1:2:1) * (1:2:1). S5: The genotype rrYY appears twice as frequently as RRYY in the F2 generation.
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