Ms. Edmondson Question #1 What does the term phenotype mean? Answer: How a trait appears/looks Question #2 What does the term genotype mean? Answer: The group of genes that make up a trait (the letters) Question #3 What does a capital letter mean? Answer: It means the allele is dominant Question #4 If an allele is recessive how many copies of the allele are needed for it to be expressed? Answer: Two copies (aa-one from mom and one from dad) Question #5 What type of alleles are known as ‘loud and bossy’? Answer: Dominant alleles Question #6 Purple flowers (P) are dominant to white flowers. Write the genotype of a heterozygous purple flower. Answer: Pp Question #7 Purple flowers (P) are dominant to white flowers. If a white flower is crossed with a heterozygous purple flower, what is the chance of having white flowers? p P Answer: 50% p Pp pp p pp Pp Question #8 Purple flowers (P) are dominant to white flowers. If two heterozygous flowers are crossed, what is the chance of having white flowers? p P Answer: 75% P PP Pp p pp Pp Question #9 Is AA, heterozygous, homozygous dominant or homozygous recessive? Answer: heterozygous dominant Question #10 If red colored dragons are dominant to orange colored dragons what is the phenotype for a dragon who is Rr? Answer: Red Question #11 If red colored dragons are dominant to orange colored dragons what is the genotype for a dragon who is orange (use R)? Answer: rr Question #12 What is another name for homozygous? Answer: Purebred Question #13 What is another name for hybrid? Answer: Heterozygous Question #14 In Oompa Loompahs, gray faces (G) are dominant to orange. If a homozygous gray faced male married a heterozygous gray female and they have 6 kids, about how many will have gray G G faces? G GG GG Answer: ½ * 6 = 3 g Gg Gg Question #15 Two heterozygous Oompahs are crossed. What proportion of the offspring will have orange faces? Answer: 75% G g G GG Gg g Gg gg Question #16 In a certain type of fish there are three possible alleles; red, orange, and yellow. Orange is the intermediate of red and orange. Assuming red is R and yellow is Y, what is the genotype for the orange fish? Answer: RY Question #17 In these same fish where RR- Red, RY- Orange, and YY- Yellow, what are all of the possible phenotypes of an orange fish is mated with a yellow fish? R Y RY YY Y RY YY Answer: orange and yellow Y Question #18 In these same fish where RR- Red, RY- Orange, and YY- Yellow, what are all of the possible genotypes if two orange fish are mated? Answer: RR, RY, YY R Y R RR RY Y RY YY Question #19 In these same fish where RR- Red, RY- Orange, and YY- Yellow, what are the chances of having yellow fish if a red fish is mated with a yellow fish? Answer: 0%, all would be orange R R Y RY RY Y RY RY Question #20 R is red and W is white in 4 o’clocks. If a pink flower is crossed with a red flower what are the chances of getting red flowers? Answer: 50% chance R W R RR RW R RR RW Question #21 In heffalumps, pink (P) and yellow (Y) are equally dominant, the heterozygote is spotted. If two spotted heffalumps are mated, what are the changes of getting the yellow gene? Answer: 25% chance P Y P PP PY Y PY YY Question #22 In heffalumps, pink (P) and yellow (Y) are equally dominant, the heterozygote is spotted. If a pink heffalump is mated with a spotted heffalump, what are the changes of getting the yellow gene? Answer: 0% chance P Y P PP PY P PY PP Question #23 In some cattle the color roan is a mixture of red (R) and white (W)? What are the genotypes for the following colors: Red- ____ White- ____ Roan- __ Answer: RR, WW, RW Question #24 In some cattle the color roan is a mixture of red (R) and white (W)? If a red cow and a white bull are mated, what are the chances of having roan babies? Answer: 100% R R W RW RW W RW RW Question #25 In humans, blood type is a classic example of a trait inherited by multiple alleles. What does multiple alleles mean? Answer: There are more than two alleles for a trait (within a population). Question #26 In humans, blood type is a classic example of a trait inherited by multiple alleles. How many different alleles are there? Answer: 3 Question #27 In humans, blood type is a classic example of a trait inherited by multiple alleles. What are the three alleles possible? Answer: A, B, and O Question #28 In humans, blood type is a classic example of a trait inherited by multiple alleles. How many alleles does each person receive? Answer: 2, one from mom and one from dad Question #29 Complete the following: Blood Types ____ and ____ are dominant over Type O Answer: A and B Question #30 Complete the following: Blood Types ____ and ____ are codominantly expressed, meaning they are expressed together Answer: A and B Question #31 What blood type is known as the universal donor and why? Answer: Type O blood, because it has no antigens on its surface and therefore can be given to any person Question #32 What blood type is known as the universal receiver and why? Answer: Type AB blood, because it will not react poorly to antigen A or B and a person with this blood type can receive a tranfusion from anyone Question #33 If a mother is homozygous for type A blood and a father is heterozygous for type B blood, what are the chances of having a child with type O blood? Answer: 0% A A B AB AB O AO AO Question #34 If a mother has type B blood and her son has type O blood is the mother homozygous B or heterozygous B? Answer: Heterozygous, because he had to get one O from dad and one O from mom Question #35 A woman and her husband claim that their child was mixed up on the hospital because of its dark hair. The mother has type B blood and the father has type A blood. The alleged child has type O blood. Should the parents be concerned? Answer: No, the mom and dad could both be heterozygous resulting in a child with type O blood.