Red coloration in wheat plants is a complex trait influenced by three unlinked genes, each with two different alleles: A and a; B and b; C and c
This Punnett square shows the results
of a mating between two plants that are both heterozygous at all three loci. Use the Punnett
square to answer the following question:
The intensity of the red color phenotype is influenced by only one of the gene products.
A. true
B. false
B
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The major growth surge in the human population that occurred about 11,000 years ago is attributed to the beginnings of ________
a. medical care b. religion c. stone spear and blade technology d. agriculture
Steroid hormones and thyroid hormones do not
require a membrane receptor because they a. are small enough to pass directly through the membrane. b. are soluble in the lipid bilayer. c. pass through special membrane channels. d. are water-soluble. e. dissolve in the cholesterol of the membranes.
Cas9 endonuclease differs from a restriction enzyme in that ________.
A. restriction enzymes recognize a 4-8bp target sequence in the DNA and directly cleave at that site, whereas Cas9 contains a guide RNA that is complementary to a specific DNA site and a polypeptide that cleaves once hybridization is complete B. restriction enzymes recognize 4-8bp sequence of the DNA, whereas the amino acids in Cas9 recognizes sequences that are approximately 20bp in length C. Cas9 recognizes a 4-8bp target sequence in the DNA and directly cleave at that site, whereas restriction enzymes contain a guide RNA that is complementary to a specific DNA site and a polypeptide that cleaves once hybridization is complete D. restriction enzymes can cleave any loci in the DNA molecule, whereas Cas9 can only cleave DNA fragments that originated as mobile genetic elements such as phages and transposons
Smooth muscles in the stomach are capable of mechanical digestion.
Answer the following statement true (T) or false (F)