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Answer key Ch 4 HW - Answer key Ch 4 practice questions MCQ...

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Answer key Ch. 4 practice questions: MCQ: 1) C 2) B 3) D 4) C 5) B T/F: 1) F 2) F 3) T 4) F 5) T 6) F 7) F Match A and B: 1) E 2) D 3) F 4) B 5) G 6) A 7) C
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Short Questions: 1) Incomplete dominance means the phenotype of the heterozygote is intermediate to the phenotypes of the homozygotes. Codominance refers to situations in which both alleles are expressed and both phenotypes are manifested simultaneously. 2) Epistasis: when a gene or pair of genes mask the expression of a gene at a different locus. This is a non-allelic interaction. Dominance: an allelic interaction of two alleles of a single gene or locus, in which the phenotype corresponds only to the dominant allele. 3) In X-linked inheritance, the gene is on the X chromosome, while in sex-influenced inheritance, the gene is autosomal. Example of sex-influenced inheritance: pattern-baldness 4) Complementation tests are used to determine whether different recessive mutations affect the same gene or locus (are alleles) or whether they affect different genes.
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