The proband in a pedigree is always heterozygous. Indicate whether the statement is true or false
F
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When the Catabolite Activator Protein binds to its binding site in DNA, it
A. bends the DNA. B. eliminates the need for a sigma factor on the part of RNA polymerase. C. promotes the assembly of other transcription factors at the promoter. D. displaces repressors.
Diploid organisms, such as humans and other mammals, have two copies of their genetic material in the form of homologous chromosomes. One copy of each homologous chromosome is passed to the organism from each of its parents during the process of fertilization. For many genetic traits, a diploid organism is said to be either homozygous or heterozygous at a particular locus, depending on whether its parents passed down two of the same or two different alleles for that specific sequence. Which of the following describes a homozygous locus?
Select all that apply. 1. The presence of two or more alleles fro a particular trait in the gene pool 2. The alleles at a particular position on homologous chromosomes of an individual with two true-breeding parent for different alleles 3. the alleles at a particular position on homologous chromosomes of an individual who expresses a recessive trait 4. two of the same alleles are found in a particular position on homologous chromosomes 5. two alleles that are positioned on the same chromosome
Which cells are held in reserve to be used for a rapid response to subsequent intruders of the same type?
a. NK cells b. helper T cells c. cytotoxic T cells d. memory cells e. B cells
Which of the following is included in the R.I.C.E. treatment regimen?
What will be an ideal response?