Genetics Vocabulary Test Corrections 12/13

Explanation: I completed the quiz and rushed to submit it right as we needed to move on. However when I looked back up to my computer it didn't load properly. So I reloaded the page and found that the answers were blank and it had erased all of the work I had done. Seeing that I couldn't redo the work because we had moved on to something different, I decided to le
ave it and do a regrade.

*For the first question, the exact definitions that were originally provided weren't there when I went over the quiz results so my definitions will not be the exact same as the original definitions.

1. Match the vocabulary words with the correct definitions

a. Genotype:  A genotype is the pair of alleles or each form of a gene.
b. Phenotype: A phenotype is a visible trait or characteristic of an individual organism.
c. Allele: An allele is each form of a gene.
d. Homozygous: Homozygous is a term that describes having two of the same allele for a trait.
e. Heterozygous: Heterozygous is a term that describes having two different alleles for a trait.
f. Dominant Trait: A dominant trait is when a single copy of its gene is inherited.
g. Recessive Trait: A recessive trait is when a copy of the recessive gene form is inherited from each parent.

2. Mendel concluded that the alleles for tall stems in pea plants are dominant. Thus, in crossing a purebred tall pea plant with a purebred short pea plant should result in

A. All tall plants
B. All short plants
C. All medium height plants
D. Half short and half tall plants

I chose A. because when the alleles for tall stem in pea plants are dominant, it doesn't matter what is in crossing with a purebred tall pea plant because the offspring will always be tall. In this situation, the short purebred effects will not be seen in the heterozygous offspring. In order for the pea plant offspring to be tall, it can either have one tall allele or two tall alleles in its genes because the tall trait is dominant. For the plant to be short, it would require two short alleles because it is recessive. Since the alleles of all of the offspring will be something like Tt, the offspring are guaranteed to be tall.