Review for Test Mrs. Anna Ward James Martin MS. DO NOW!!! In Zorks, Green Skin (R) is dominant to yellow skin (r). Complete a cross between a Homozygous.

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Presentation transcript:

Review for Test Mrs. Anna Ward James Martin MS

DO NOW!!! In Zorks, Green Skin (R) is dominant to yellow skin (r). Complete a cross between a Homozygous Green Zork (RR) and a yellow skinned zork (rr). 1.What are the possible genotypes this cross can make? 2.What are the possible phenotypes? 3.What percent of the offspring will be green? 4.What percent of the offspring will be yellow?

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Vocabulary Review 1 Punnett squares can be used to predict the probability of: a)Being exposed to a contagious disease and contracting it b)Having an inherited disease or a genetically determined physical trait c)How likely you are able to perform a task d)All of the above

Vocabulary Review 2 A genotype is: a)The actual characteristics that can be observed b)A genetic disease c)The actual combination of alleles an organism has d)Various forms of the same gene

Vocabulary Review 3 A phenotype is: a)The actual characteristics that can be observed b)A genetic disease c)The actual combination of alleles an organism has d)Various forms of the same gene

Vocabulary Review 4 What is the name for the allele that is expressed in the phenotype even if only one copy is present in the genotype? a)Recessive b)Punnetts c)Prevailing d)Dominant

Vocabulary Review 5 What is the name for the various forms of the same gene? a)Genotype b)Allele c)Phenotype d)Heredity

Review Problem #1 In pea plants, the allele for smooth peas is dominant over the allele for wrinkled peas. Create a Punnett Square and calculate the probability that two smooth pea plants will have an offspring with wrinkled peas if each parent has one smooth and one wrinkled allele.

Review Problem #2 AA ____ Bb ____ Cc ____ Dd ____ Ee ____ ff ____ GG ____ HH ____ Which of the following GENOTYPES are HETEROZYGOUS (HE) or HOMOZYGOUS (HO)?

Review Problem #3 For each of the genotypes below, determine the phenotype. Purple flowers are dominant to white flowers PP ___________________________ Pp ___________________________ pp ___________________________ Brown eyes are dominant to blue eyes BB ___________________________ Bb ___________________________ bb ___________________________

Review Problem #4 R=round r=wrinkled RR x rr What percentage of the offspring will be round?

Review Problem #5 R=round r=wrinkled RR x Rr What percentage of the offspring will be round?

Review Problem #6 R=round r=wrinkled Rr x Rr What percentage of the offspring will be round?

Review Problem #7 R=round r=wrinkled RR x RR What percentage of the offspring will be round?

Review Problem #8 R=round r=wrinkled Rr x rr What percentage of the offspring will be round?

Review Problem #9 R=round r=wrinkled Rr x rr What percentage of the offspring will be round?

Review #10 1.How many females? 2.How many males? 3.How many people have the disease? 4.How many are males with the disease? 5.How many are females with the disease? 6.How many generations are represented? 7.How many marriages do you see? 8.How many children did the couple in the first generation have?