Question

27. For the cross in #26, if the purple flowered parent is a heterozygote, which of the following would be the expected offspring A. all purple offspring B. 1/2 purple, 1/2 white offspring C. all white offspring D. ratio 3 purple:1 white offspring E. ratio:1 purple:2 pink:1 white offspring 28. For the cross in #26, if the purple flowered parent is a homozygote, which of the following would be the expected offspring A. all purple offspring B. 1/2 purple, 1/2 white offspring C. all white offspring D. ratio 3 purple:1 white offspring E. ratio:1 purple-2 pink:1 white offspring You are doing an experiment with mice. Rr mice have a red coat color, rr mice have a black coat color and RR mice die before birth. Choose from these answers for questions 29 - 32: A. V B. 1/3 C. 2/3 D. 14 E. % G. none of the mice F. all of the mice 29. You mate 2 red mice with each other. Of the live offspring, how many would be red? 30. You mate 2 red mice with each other. Of the live offspring, how many would be black? 31. You mate a red mouse with a black mouse. Of the live offspring, how many would be black? 32. You mate a red mouse with a black mouse. Of the live offspring, how many would be red? 33. A color blind male has children with a woman who has normal vision. N is the normal dominant allele and n is the recessive allele. They have a color blind daughter, a daughter with normal vision, a color blind son, and a son with normal vision. The genotypes of the mother and father would be as follows: A. mother XNXN father: X Y B. mother XX father: X Y B. mother XX" father: XY D. mother XX father: X Y 34. Morgan crossed a white-eyed male fly with a female red-eyed fly. All of the F1 offspring had red eyes. These F1 red-eyed flies are A. homozygotes B. heterozygotes C. not enough information 35. Morgan then crossed 2 of the red-eyed F1 generation flies to each other. % of the offspring were red-eyed and 4 were white-eyed. All of the white-eyed offspring were male because A. the eye color gene is recessive, on the Y chromosome B. the eye color gene is dominant, on the X chromosome C. the eye color gene is recessive, on the X chromosome D. the eye color gene is dominant, on the Y chromosome 36. Individuals with SsTt genotype were mated with individuals with sstt genotype. The progeny were as follows: 712 Sstt, 698 ss Tt, 19 SsTt, 22 sstt. The Sand T loci are: A. Linked B. Unlinked C. Not enough information

for questions 25 - 26 using the letters below. This set of questions refers to Mendel’s plants with either Purple flowers or White flowers A. PP B. Pp C. pp D. PP or Pp E. Pp or pp F. PP or pp G. none of these answers 25. A purple flowering pea plant of unknown genotype would be best described by which answer above 26. To determine the genotype of a purple flowering plant of unknown genotype, you would cross the purple flowering plant with which type of plant (choose from answers above)?

Answer 1

QUESTION 25 In this case, if the trait is inherited by an autosomal pattern. The P allele (purple) is dominant to the p allele (white). A purple flower just need one P allele to be purple. So, the correct answer is D. PP or Pp QUESTION 26 To know the genotype of a dominant phenotype, we need to make a test cross. A test cross refers to cross the unknown genotype plant with a homozygous recessive individual. So, the correct answer is pp QUESTION 27 If the unknown parent is heterozygous: Aa x aa A la 2/4 = 1/2 = Purple (Aa) 2/4 = 1/2 = White (aa) So, the correct answer is B. 72 purple, la white offspring Аа aa Aa aa QUESTION 28 If the unknown parent is homozygote: AA x aa A A 4/4 = 1 Purple flowers (Pp) So, the correct answer is A. All purple offspring Aa Aa Aa Aa

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