Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Name: _________________ PUNNETTE SQUARE PROBLEMS: #1.) Albinism is the absence of skin pigmentation and is a recessive trait found in humans and other animals. In the human population about 1/20,000 individuals is an albino. Normal pigmentation (A) is dominant to albinism (a). If an albino woman marries a homozygous normal man, what is the likelihood that one of their children will display albinism? KEY: ____________________________________________________________ PARENTAL GEOTYPES: ♀ ________________ ♂ ________________ POSSIBLE GAMETES (eggs and sperm): ♀____ and _____ ; ♂ _____ and _____ SET UP AND FILL IN THE PUNNETT SQUARE: ♂ PHENOTYPES: ______________________________ ♀ GENOTYPES: _______________________________ ANSWER THE QUESTION: ________________________________________________________ #2.) A common squash in Texas is the Yellow crooked-neck squash. This fruit is a source of vitamin A, B, and C. It also contains calcium and iron. Yellow colored squash is recessive to white-colored squash. If a yellow male squash is crossed with a heterozygous female white-squash, what are the predicted genotypes and phenotypes of offspring? KEY: ____________________________________________________________ PARENTAL GEOTYPES: ♀ ________________ ♂ _______________ POSSIBLE GAMETES (eggs and sperm): ♀____ and _____ ; ♂ _____ and _____ SET UP AND FILL IN THE PUNNETT SQUARE: ♂ PHENOTYPES: ______________________________ ♀ GENOTYPES: _______________________________ ANSWER THE QUESTION: ________________________________________________________ Name: _________________ #3.) Polydactylous cats have more than five toes. In fact, the author, Ernest Hemingway is credited with establishing a large colony of about 50 feral polydactylous cats in the Florida Keys. One of his cats, Princess six-toes appeared in the New York Times. The polydactyl allele (P) is dominant over the allele for five toes and fingers (p). Predict the offspring of a mating between a heterozygous polydactylous male cat and a female cat homozygous for five toes and fingers. KEY:___________________________________________________________ PARENTAL GEOTYPES: ♀ _______________ ♂ ________________ POSSIBLE GAMETES (eggs and sperm): ♀____ and _____ ; ♂ _____ and _____ SET UP AND FILL IN THE PUNNETT SQUARE: ♂ PHENOTYPES: ______________________________ ♀ GENOTYPES: _______________________________ ANSWER THE QUESTION: ________________________________________________________ #4.) Blood type in humans is controlled by 2 of 3 possible alleles. Type A & type B blood may be inherited in a heterozygous or dominant fashion, while type O blood is homozygous recessive & type AB blood is co-dominant that is both alleles express at the same time. Cross a heterozygous male with a heterozygous female. What are the phenotypic and genotypic ratios that result. Be sure to superscript the A,B, & I alleles. KEY: _______________________________________________________ PARENTAL GEOTYPES: ♀________________ ♂ _______________ POSSIBLE GAMETES (eggs and sperm): ♀____ and _____ ; ♂ _____ and _____ SET UP AND FILL IN THE PUNNETT SQUARE: ♂ PHENOTYPES: ______________________________ GENOTYPES: _______________________________ ♀ ANSWER THE QUESTION: _________________________________________