Assume that a cross is made between two organisms that are both heterozygous for a gene that shows incomplete dominance. What phenotypic and genotypic ratios are expected in the offspring?
A) phenotypic 1:2:1; genotypic 1:3
B) phenotypic 1:2:1; genotypic 1:1:1:1
C) phenotypic 1:2:1; genotypic 1:2:1
D) phenotypic 1:1:1:1; genotypic 1:2:1
E) phenotypic 3:1; genotypic 1:2:1
Answer: C
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According to the graph from Figure 18.11 which complex trait shows very little influence from a genetic component?
A. autism B. clinical depression C. schizophrenia D. male alcoholism E. female alcoholism
The function of the structure labeled "2" is
a. food intake. b. digestion. c. waste elimination. d. water discharge. e. asexual reproduction.
Large habitat patches typically contain more individuals and species than smaller habitat patches
Indicate whether the statement is true or false
Hox genes are a family of transcription factors that regulate development throughout the animal kingdom. Studies of Hox genes in mice and Drosophila showed that many Hox genes are conserved between both species, and several Hox genes duplicated into new genes with novel functions within mice. Some Hox genes have even lost all function. Hox genes provide an example of which of the following? Check all that apply.
A. pseudogenes B. heterologues C. orthologs D. paralogs