____ are the units of heredity.
Which of the following is the genetic material of cells?
|D)||It has not been identified.|
The field of genetics that studies the interactions of many genes is called ____.
Which of the following is not a potential use for results of genetic testing?
|A)||to detect genes that affect addictive behavior|
|B)||to diagnose and treat cancer|
|C)||to indicate which types of infections a patient is most susceptible to, and which antibiotics will most effectively treat them|
|D)||All of the above are potential uses of genetic testing.|
Variants of genes are called ____, and these arise by a process called ____.
A variant in a sequence of DNA that is present in at least 1% of a population is called a(n)______.
A human female has ____ pairs of autosomes and ____ sex chromosomes.
Linda and Ben request prenatal genetic testing to determine if their unborn child has Down syndrome. Cells are collected from the fetus and the chromosomes are examined in a ____ analysis.
A gene may have many alleles, but each individual has only two alleles because _____.
|A)||having more than two alleles is lethal|
|B)||having more than two alleles unbalances the chromosomes|
|C)||a person has two parents who each contribute one allele|
|D)||a backup set of alleles is necessary in case something goes wrong|
The ____ refers to the underlying instructions in an individual (alleles present), while the ____ is the visible trait, biochemical change, or effect on health (alleles expressed).
All the alleles in a population constitute the _____.
Which of the following statements is true regarding genomes?
|A)||Humans and chimpanzees share about 50% of their DNA sequences.|
|B)||Comparisons of people at the genome level reveal that we are much more alike genetically than are other mammals.|
|C)||The more different DNA sequences of two species are to one another, the more recently two species diverged from a single ancestor.|
|D)||All of the above are true regarding genomes.|
Traits determined by one or more genes and by the environment are called _____.
A transgenic organism has _____.
|A)||no genes at all|
|B)||a gene or genes from a different species|
|C)||a dominant phenotype|
|D)||had its genome sequenced|
The technique of ____ attempts to correct certain genetic disorders.
DNA profiling can be used to _____.
|A)||identify remains of individuals|
|B)||overturn convictions of innocent people|
|C)||determine family relationships|
|D)||All of the above|
____ is the use of organisms to produce goods or services.
Organisms altered to have new genes or to over- or underexpress their own genes are termed _____.
|C)||genetically modified (GM) organisms|
In metagenomics, DNA is collected from habitats and used to reconstruct _____.
____, also known as deoxyribonucleic acid, is the molecule whose building block sequence encodes the information that a cell uses to construct a particular protein.
A(n) ____ allele exerts an effect when present in just one copy, while a ____ allele exerts an effect only when present in two copies.
The normal human karyotype has a total of ____ chromosomes.
A pedigree is a diagram used to follow the inheritance pattern of a trait in a _____.
The expression of different subsets of genes drives the ____, or specialization, of distinctive cell types.