For a particular plant, leaf texture is either fuzzy or smooth. A homozygous fuzzy plant is crossed with a homozygous smooth plant. All offsprings are smooth. Which sentence best describes the alleles for this trait?
A. Fuzzy is dominant over smooth
B. Smooth is dominant over fuzzy
C. The alleles are co-dominant
D. The alleles have incomplete dominance
I think the answer is A, but I am not sure...
Nope, a silly, unthinking choice.
so the answer is wrong, What do you think could be the right one? I am still confused... Could you explain?
nevermind, I figured it out
B, smooth is dominant over fuzzy
To determine the best answer, we can use the information provided and apply some knowledge of genetic inheritance. We are told that leaf texture can be either fuzzy or smooth, and that a homozygous fuzzy plant (meaning it has two copies of the "fuzzy" allele) is crossed with a homozygous smooth plant (having two copies of the "smooth" allele).
From this information, we know that all the offspring are smooth. This suggests that the smooth trait is expressed in all the offspring, while the fuzzy trait is not expressed. In the context of genetics, this indicates that the smooth trait is dominant over the fuzzy trait.
Therefore, the correct answer would be B. Smooth is dominant over fuzzy.
To arrive at this answer, we made an inference using the principles of dominance and recessiveness. By observing the traits exhibited in the offspring, we can deduce the relationship between the fuzzy and smooth alleles.