10 Questions
What is the reason for the altered phenotype ratios in the Snapdragon monohybrid cross?
Incomplete dominance of R over r
What is the function of a gene in a diploid organism?
To contain information for expressing a particular trait
What is the difference between the two alleles in a heterozygote?
One is mutated and the other is normal
Why are there two copies of each gene in a diploid organism?
Because it is a pair of alleles
What is the result of incomplete dominance in the Snapdragon cross?
A 1:1:1:1 phenotype ratio
What is the role of the normal allele in the enzyme production example?
It produces a normal enzyme
Why can Rr be distinguished from RR and rr in the Snapdragon cross?
Because R is incompletely dominant
What is the term for the phenomenon where one allele is not completely dominant over the other?
Incomplete dominance
What is the significance of the two allelic forms in the enzyme production example?
One is normal and the other is modified
Why does the Snapdragon cross not follow the expected 3:1 dominant : recessive phenotype ratio?
Because R is not completely dominant over r
This quiz covers the concepts of modified alleles and their effects on enzyme production, including the production of normal, less efficient, non-functional, or no enzyme at all. Understand how these variations impact phenotypes and traits.
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