The results of a study of a population is presented in the following table
The "-" indicates that the other allele is unknown
Parent1 phenotype Parent 2 phenotype Ratio and phenotype of offspring
S - S - 989 S - 53 ss
ss S - 560 S- 200 ss
ss ss 700 ss
Which of the conclusions listed below is correct?
A. All of the S - offspring from the S - X S - matings are homozygotic
B. If the S- offspring of the S - X S - matings were mated to the S - offspring from the S - X ss matings there would be no ss offspring all would be S -
C. The ratios of the offspring in the S- X S - matings conform to the expected ratio for a monhybrid cross
D. The ratios of the offspring in the S - X S - matings are due to some S - parents being homozygotic and some being heterozygotic
Blooms Level:
D
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The primary result of meiosis is:
A. gamete formation. B. two daughter cells from one parental cell. C. four daughter cells from one parental cell. D. gamete formation, two from one parental cell. E. gamete formation, four from one parental cell.
What is an example of a +/- interaction?
A. competition B. mutualism C. commensalism D. predation E. both competition and parasitism
Although the authors disagree completely on the use of GE crops, there are one or two points of view they share. Review the statements below and select one that represents a shared view.
a. Globally there is enough food available for all humans. b. Plant biotechnology is the best approach for conserving natural resources. c. People in some parts of the world will need more food. d. Agro-chemicals are a safe way to increase crop yields.
The earliest microbial fossils that have been found are dated from approximately 4.5 million years ago.
Answer the following statement true (T) or false (F)