Bean plants have different symptoms (phenotypes) when infected with a virus. Some show local lesions Show more Bean plants have different symptoms (phenotypes) when infected with a virus.
Bean plants have different symptoms (phenotypes) when infected with a virus. Some show local lesions Show more Bean plants have different symptoms (phenotypes) when infected with a virus.
Some show local lesions that do not seriously harm the plant while others show general systemic infection. In other words there are two contrasting phenotypes observed: local lesions and systemic infection. You do not know if these phenotypes are caused by different alleles of the same gene or alleles of different genes. The following genetic analysis was done: Parental cross: local lesions X systemic infection (both pure breeding). In the F1 generation you find 100% of bean plants with the local lesion phenotype. F1 cross: local lesions X local lesions HYPOTHETICAL RESULTS 1: In the F2 generation there were 850 bean plants with the local lesion phenotype and 200 bean plants with the systemic infection phenotype (Ratios to consider: 13:3 15:1 9:7 and 3:1). a) State your hypothesis to explain the F2 generation (must be testable). b) State your null hypothesis: c) Do a chi square test to accept or reject your hypothesis. d) State an alternate hypothesis (if you reject your hypothesis)? Show less
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