9. Achondroplasia is a form of dwarfism caused by a dominant allele. The homozyg

Question

9. Achondroplasia is a form of dwarfism caused by a dominant allele. The homozygous dominant genotype causes death during development. If a person with achondroplasia mates with a person who does not have achondroplasia, what percentage of their children would be expected to have achondroplasia? a. 0% b. 25% ?. 50% d. 75% e. 100% 10. In a cross between AaBb and aabb, a phenotypic ratio of 1AB: 1Ab 1aB:1ab indicates that the genes are but a phenotypic ratio of 7AB: 1Ab 1aB:7ab indicates that the genes are a. epistatic, independent d. independent, assorted b. nondisjunction, junction e. linked, unlinked c. unlinked, linked f. variable, epistatic

Explanation / Answer

9. 50 %

10.c. in a cross between AaBb and aabb, a phenotypic ratio of 1AB:1Ab:1aB:1ab indicates that the genes are unlinked but a phenotypic ratio of 7 AB:1Ab:1aB:7ab indicates that the genes are linked .

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