_______ refers to the combination of alleles that an individual has for a gene.
a) Polygenic inheritance
b) Codominance
c) Genotype
d) Phenotype
Ans: c) Genotype
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Carbon dioxide in the atmosphere absorbs heat energy and emits it in all directions, making it a ____
Fill in the blank with the appropriate word.
Which of the following is least likely to be the result of a mutation in the promoter of a gene?
A. The level of expression of that gene increases. B. The level of expression of that gene decreases. C. The protein sequence of the gene product is altered. D. The level of expression of that gene remains the same.
Down’s syndrome individuals have how many chromosomes?
a. 23 b. 24 c. 45
d. 46 e. 47
A sizable population was analyzed for SNPs in a certain DNA region. Four possible variants were found, with the following frequencies: SNP 1: GGTCTAGGA; frequency = 0.91 SNP 2: GGTGTAGGA; frequency = 0.03 SNP 3: GGTATAGGA; frequency = 0
03 SNP 4: GGTTTAGGA; frequency = 0.03 If the population is in Hardy-Weinberg equilibrium, what is the total frequency of heterozygotes at this SNP locus? A) 0.828 B) 0.009 C) 0.170 D) 0.055 E) 0.0018