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## Science 9 Ms. Dureault ### Genetics Problems 1. For each of the genotypes below determine what the phenotype (characteristic) would be: * Purple flowers are dominant to white flowers: * **Pp:** Purple flowers * Hairy knuckles are dominant to non-hairy knuckles in humans....

## Science 9 Ms. Dureault ### Genetics Problems 1. For each of the genotypes below determine what the phenotype (characteristic) would be: * Purple flowers are dominant to white flowers: * **Pp:** Purple flowers * Hairy knuckles are dominant to non-hairy knuckles in humans. * **HH:** Hairy knuckles * **Hh:** Hairy knuckles * Bobtail in cats are recessive. Normal tails are dominant. * **TT:** Normal tail * **tt:** Bobtail 2. For each of the following write whether it is pure dominant, hybrid dominant, or pure recessive. * **GG:** Pure dominant * **D. tt:** Pure recessive * **E. Hh:** Hybrid dominant * **Pp:** Hybrid dominant 3. In dogs, the gene for fur color has two alleles. The dominant allele (F) codes for grey and the recessive allele (f) codes for black hair. The female dog is hybrid dominant. The male dog is pure recessive. Figure out the possible phenotypes and genotypes of their offspring by drawing a Punnett square. | | F | f | |:-------|:----------|:---------:| | **F** | FF | Ff | | **f** | Ff | ff | **Percent of Possible Genotype:** * **FF:** 0/4 * **Ff:** 2/4 * **ff:** 2/4 **Percent of possible Phenotype:** * **Black fur:** 2/4 * **Grey fur:** 2/4 4. In fruit flies, red eyes are dominant (E). White eyes are recessive (e). If the female fly has white eyes and the male fly has pure dominant red eyes, what are the possible phenotypes and genotypes of their offspring? | | E | E | |:-------|:----------|:---------:| | **e** | Ee | Ee | | **e** | Ee | Ee | **Percent of Possible Genotype:** * **FF:** 0/4 * **Ff:** 4/4 * **ff:** 0/4 **Percent of possible Phenotype:** * **Black fur:** 0/4 * **Grey fur:** 4/4