A recessive allele is one
A) that produces no effect when present in the homozygous condition.
B) that is not expressed as strongly as a dominant allele.
C) that must be lethal in the homozygous condition.
D) whose effect is masked when paired with a dominant allele.
E) that appears only in a heterozygote.
D
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An ovule
(a) is the structure that develops into a seed. (b) contains the microsporophyll. (c) is produced on the surface of a male cone. (d) is all of the above.
The use of ____________________ is banned or restricted in more than 23 countries due to its toxicity
Fill in the blank(s) with correct word
An mRNA that contains the coding sequence for two or more structural genes is called a
A. polyintronic mRNA. B. polyextronic mRNA. C. polycistronic mRNA. D. polyexpressive mRNA. E. polyrepressor mRNA.
Principle(s) of the chromosome theory of inheritance include: Check all that apply.
_____ Genes are transmitted from parent to offspring via chromosomes. _____ Gametes contain either a maternal or paternal set of chromosomes. _____ Somatic cells contain a maternal and paternal set of chromosomes. _____ The paternal and maternal chromosomes assort randomly during meiosis. _____ Gametes are haploid and somatic cells are diploid.