BIO 351 MIDTERM| QUESTIONS WITH CORRECT ANSWERS| LATEST UPDATE
GUARANTEED SUCCESS
Sanger sequencing a method of DNA sequencing based on the selective incorporation of
chain-terminating dideoxynucleotides by DNA polymerase during in vitro DNA replication
monosomy Chromosomal abnormality consisting of the absence of one chromosome from
the normal diploid number
trisomy an extra chromosome
Anueploidy Abnormal number of chromosomes.
often a result of nondisjuction of a homologous chromosome in meiosis I or nondisjuction of a
sis chromatid in meiosis II
sex chromosome anueploidies are more common (becuase embryos are more likely to be
vioable than autosomal aneuploidy
Genetic mosaicism Condition in which regions of tissue within a single individual have
different chromosome constitutions.
Turner Syndrome A chromosomal disorder in females in which either an X chromosome is
missing, making the person XO instead of XX, or part of one X chromosome is deleted.
, homogametic sex chromosomes are of one type
female human XX
male chicken ZZ
pseudoautosomal Shared between X and Y and required for pairing of X and Y during
meiosis in males. Same on X and Y and are at both ends
hemizygous A gene present on the X chromosome that is expressed in males in both the
recessive and dominant condition
when you have X and Y, one alllele of the other not both (male sex linked)
important differences between autosomal and sex linked hemizygous males ( no chance to
be dominant/recessive)
outcome of cross can be different for male vs. female offspring
male offspring geno and pheno soley determined by mom's geno
female offspring geno/pheno influenced by both
chiasmata X-shaped regions where crossing over occurred.
GUARANTEED SUCCESS
Sanger sequencing a method of DNA sequencing based on the selective incorporation of
chain-terminating dideoxynucleotides by DNA polymerase during in vitro DNA replication
monosomy Chromosomal abnormality consisting of the absence of one chromosome from
the normal diploid number
trisomy an extra chromosome
Anueploidy Abnormal number of chromosomes.
often a result of nondisjuction of a homologous chromosome in meiosis I or nondisjuction of a
sis chromatid in meiosis II
sex chromosome anueploidies are more common (becuase embryos are more likely to be
vioable than autosomal aneuploidy
Genetic mosaicism Condition in which regions of tissue within a single individual have
different chromosome constitutions.
Turner Syndrome A chromosomal disorder in females in which either an X chromosome is
missing, making the person XO instead of XX, or part of one X chromosome is deleted.
, homogametic sex chromosomes are of one type
female human XX
male chicken ZZ
pseudoautosomal Shared between X and Y and required for pairing of X and Y during
meiosis in males. Same on X and Y and are at both ends
hemizygous A gene present on the X chromosome that is expressed in males in both the
recessive and dominant condition
when you have X and Y, one alllele of the other not both (male sex linked)
important differences between autosomal and sex linked hemizygous males ( no chance to
be dominant/recessive)
outcome of cross can be different for male vs. female offspring
male offspring geno and pheno soley determined by mom's geno
female offspring geno/pheno influenced by both
chiasmata X-shaped regions where crossing over occurred.
