Chapter 14 Flashcards
1
Q
What is the difference between a monohybrid cross and a dihybrid cross?
A
A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid only one
2
Q
The F1 offspring of Mendel’s classic pea cross always looked like one of the two parental varieties because
A
One phenotype was completely dominant over the other
3
Q
Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. This suggests
A
That the parents were both heterozygous
4
Q
A sexually reproducing animal has two unlike genes, one for head shape (H) and one for tail length (T). It's genotype is HhTt. Which of the following genotypes is possible in a gamete from this organism? A. HT B. Hh C. HhTt D. T E. tt
A
A
5
Q
What describes the ability of a single gene to have multiple phenotypic effects?
A
Pleiotropy
6
Q
What is an example of polygenic inheritance?
A
Skin pigmentation in humans
