term1 Definition1term2 Definition2term3 Definition3
Please sign in to your Google account to access your documents:
Polyploid individualshave two or more incomplete sets of chromosomes.
False
Individuals with Down syndrome, Turner syndrome,or Klinefelter syndrome are aneuploid.
True
Reciprocaltranslocations involve an exchange of chromosome segments between twohomologous chromosomes.
The centromeres ofmetacentric chromosomes are located toward one end of the chromosome
List the four basic types of chromosomerearrangements.
deletions,duplications, inversions, and translocations
Given an individual with a singlerecessive allele, explain how a deletion could result in the expression of therecessive phenotype.
Ifa recessive allele for a locus is present on one chromosome, and the homologouschromosome contains a deletion of that locus, then the recessive allele will beexpressed, because no wild-type product is produced to mask the recessivephenotype. The normally recessive alleles expressed in individuals heterozygousfor deletions are said to display pseudodominance
___________ can cause genes to movefrom one linkage group to another.
a.Inversions
b.Deletions
c.X-rays
d.Translocations
e.Unequal crossing over
d. Translocations
Approximately ______ of the gametesproduced by an individual heterozygous for a translocation will be nonviable.
a.all
b.half
c.none
d.a quarter
e.an eighth
Two nonhomologous chromosomes have thefollowing segments: i.A ·B C D E F G
ii.R ·S T U V W X
Draw chromosomes that would result fromthe following chromosome rearrangements.
a.Reciprocaltranslocation of CD and TU:
A .B T U E F G
R ·S C D V W X
b.Reciprocal translocation of CD and W:
A ·B W E F G
R ·S T U V C D X
c.Robertsonian translocation
X W V U T S · B C D E F G
(A and R segmentswill be lost)
Need help typing ? See our FAQ (opens in new window)
Please sign in to create this set. We'll bring you back here when you are done.
Discard Changes Sign in
Please sign in to add to folders.
Sign in
Don't have an account? Sign Up »
You have created 2 folders. Please upgrade to Cram Premium to create hundreds of folders!