What are the differences between complete dominance and codominance?
What will be an ideal response?
In complete dominance, the homozygous genotype results in the dominant phenotype, whereas the homozygous recessive genotype results in the expression of the recessive phenotype. The individuals with the heterozygous genotype in complete dominance can be referred to as carriers, who are able to pass the recessive allele on to their offspring but won't actually express this gene themselves. This is because the recessive allele is masked. In the case of codominance, both alleles are expressed equally, so both proteins are synthesized and appear to be expressed equally, depending on the traits.
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Which statement describes the function of telomeres?
a. Telomeres are DNA segments that encode cell cycle checkpoint proteins. b. Telomeres are where DNA polymerase binds to initiate DNA replication. c. Telomeres serve as attachment points where microtubules bind to separate chromosomes during anaphase. d. Telomeres are added to chromosomes with each round of replication to increase DNA stability. e. Telomeres protect the coding regions of chromosomes because chromosomes are shortened with each round of replication.
The interactions and exchange of energy between all feeding levels is known as a ________
A) food web B) feeding frenzy C) trophic level D) food succession
Which technique reduces the amount of a specific RNA or protein produced by an organism?
a. knockout b. chain termination c. knockdown d. transgenesis e. knock-in
Which of these human sex chromosome genotypes is not possible?
A) XXY B) XXXY C) XXXXY D) XXX E) YYYY