Match the missing numbers in the following phrase. Relationships between phenotype and genotype become increasingly complex with the involvement of increasing numbers of genes. Consider two genes. When heterozygotes for two genes are mated, there are usually 9 different genotypes and [A] different phenotypes in the offspring. When two gene products are active in the same process or pathway, non-standard phenotypic ratios can occur instead of the usual 9:3:3:[B] ratio. For example, if both gene products A and B are needed for phenotype X to be observed, and the recessive alleles do not make gene products, in a cross between AaBb and AaBb, then [C] offspring will display phenotype X and [D] offspring will not display the phenotype.
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Q13: Genes usually have multiple alleles. Alleles that
Q14: Genes usually have multiple alleles. Alleles that
Q15: What is a polymorphic gene?
A) A gene
Q16: Why are lethal alleles usually recessive?
A) Dominant
Q17: Which of the following statements about the
Q19: Fill in the blank. Redundancy is where
Q20: What is the purpose of a complementation
Q21: Inferring a genotype from a phenotype can
Q22: What is the term for a mutation
Q23: If fewer than 100% of individuals that
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