Genetics and Genomics in Nursing A
Grade Exam Questions Solved with
100% Correct Answers
Parents carrying autosomal recessive albinism has what chance of their second child being affected? -
✔✔50%
proportion of genes in common between a woman and her great grandmother is: - ✔✔1/8
Autosomal recessive disease, if two parents have a child what is most likely the risk for the child? -
✔✔25%
Example of autosomal recessive disease - ✔✔cystic fibrosis
genetic disorders by Mendelian inheritance - ✔✔Cystic fibrosis, neurofibrosis, and hemophilia
probability of a male inheriting X-linked recessive gene from his father? - ✔✔0%
Example of X-linked recessive disorder - ✔✔Hemophilia
X-chromosome inactivation - ✔✔results in genetically turning off one of the two X chromosomes
in females
Alleles - ✔✔alternative forms of a gene that can result in different expression
Codominance - ✔✔both alleles independently expressed in heterozygote
, Translocation - ✔✔piece of DNA breaking off a chromosome and attaches itself to a non-
homologous chromosome at another location
Expresstivity - ✔✔degree which a particular genotype is expressed in a phenotype
Multifactorial disorders with polygenic components - ✔✔heart disease, diabetes, cancer, alcoholism,
and mental illnesses
Wild type - ✔✔most common phenotype in a natural population
estimate of human genes - ✔✔20,000
the HFE gene locus is 6p21 - ✔✔the HFE gene alleles are located on short arms of
chromosome number 6
Complementary base that has tightest association - ✔✔Cytosine and guanine
What condition are genotype and phenotype the same? - ✔✔Homozygosity of alleles
Child born to a mother with B/O blood and father for A/B -- chance of expression? - ✔✔25% A,
50% B, 0% O, 25% AB
Nonsense mutation - ✔✔mutation that changes a codon specifying an amino acid into a stop codon
CAT in DNA is represented as ___ in mRNA and ____ in tRNA - ✔✔CAU, GUA
Relationship among genes, DNA and proteins - ✔✔A gene is a section of DNA that provides
the directions for synthesizing a specific protein
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