Determine the observed phenotype ratio of tall plants to dwarf plants by dividin
ID: 65840 • Letter: D
Question
Determine the observed phenotype ratio of tall plants to dwarf plants by dividing the number of plants of each type by the number of dwarf plants. Round your answers to whole numbers. Is the observed ratio different from the predicted ratio? If so, explain why this may have happened. Examine the corn seedlings in tray Determine the phenotype ratio of green plants to albino plants by dividing the number of plants of each type by the number of albino plants. Round your answers to whole numbers. Indicate the type of simple dominant/recessive cross that produces this kind of ratio: Based on this observed ratio and using "G" to represent the allele for albino leaves, record the phenotypes and genotypes of the parent plants: Determine the excepted progeny of a cross between: Indicate the possible genotypes of parent pea plants in crosses yielding the following ratios: Is it possible to observe differences between homozygous and heterozygous individuals possessing the dominant allele?Explanation / Answer
h1. 3 round seeds : 1 wrinkled seed
The genotype of parents will be:
Rr X Rr
Where R is for round which is the dominant trait and r is for wrinkled which is the recessive trait.
2. All white flowers
Let C be for colored flower which is dominant in nature and c for white flower which is the recessive trait.
The genotype of parents will be:
cc X cc
The dominant C will not be present in either of the parents.
3. All purple flowers:
The three possibilities of genotypes will be:
CC X CC
CC X Cc
CC X cc
In all the three cases the progeny flowers will be purple in color.
4. 1 round seed: 1 wrinkled seed
The genotype of parents will be:
Rr X rr
i. Phenotypically if the dominant trait is expressed then it is not possible to differentiate between homozygous and heterozygous individuals. However, if we perform a test cross then we can know the difference whether the individual is heterozygous or homozygous.
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