bio 123 lab final Exam Questions
and Answers 100% Pass
nondisjunction - CORRECT ANSWER:-failure of chromosomes to separate
during anaphase 1
translocation - CORRECT ANSWER:-the transfer of a portion of one
chromosome to another, usually nonhomologous, chromosome
triple x syndrome - CORRECT ANSWER:-the individual will develop into a
normal-appearing female, but may be sterile and/or mentally retarded. XXX; two
Barr bodies; female
Klinefelter's syndrome - CORRECT ANSWER:-during early development he
amerals normal, but abnormalities become apparent at puberty. testes do not fully
develop, usually taller than average, his muscular development may be somewhat
feminine, breast development may occur, may have a higher voice and female
appearance. XXY; one Barr body; male
Turner's syndrome - CORRECT ANSWER:-she appears normal during early
development, but at puberty does not menstruate, breasts don't develope, and no
eggs are produced. OX; no Barr bodies, female.
,Jacob's syndrome - CORRECT ANSWER:-an individual appears to be sexually
normal. XYY; no Barr bodies, male
autosomal non-disjunction - CORRECT ANSWER:-non-disjunction in
chromosomes other than sex chromosomes
down syndrome - CORRECT ANSWER:-three number 21 chromosomes are
present. individuals are characterize by a fold of the upper eyelid, short stature,
broad hands, stubby feet, a wide round face, a large tongue, and mental retardation
trisomy 18 - CORRECT ANSWER:-this syndrome involves an extra chromosome
18. individuals are characterized
each DNA molecule consists of... - CORRECT ANSWER:-a sugar (deoxyribose),
a phosphate, and a nitrogenous base
the 4 nitrogenous bases - CORRECT ANSWER:-adenine, guanine, cytosine, and
thymine
mutation (related to DNA) - CORRECT ANSWER:-changes in the nucleotide
sequence
why is DNA stable - CORRECT ANSWER:-pyrimadines always pair specifically
with a larger purine
pyrimadines - CORRECT ANSWER:-thymine and cytosine
purines - CORRECT ANSWER:-adenine and guanine
, The chains of DNA are arranged in what way? - CORRECT ANSWER:-
antiparallel (5'-3' and 3'-5')
template strand - CORRECT ANSWER:-the strand of DNA that acts as a pattern
for the formation of a complementary strand to be made
complementary strand - CORRECT ANSWER:-the replicated strand that is
created from the pattern of the template strand
stop codons - CORRECT ANSWER:-UAA; UAG; UGA;
point mutations - CORRECT ANSWER:-small changes in DNA, such as base
substitutions/additions/deletions, but may have profound effects on the protein
formed by the gene, depending on where it occurs
sickle-cell anemia - CORRECT ANSWER:-a genetic disease cause by a base
substitution in the DNA of the gene coding for one of the polypeptides that makes
up hemoglobin. It is recessive.
alleles - CORRECT ANSWER:-alternative forms of the same gene (genotype) in a
gene pool
evolution - CORRECT ANSWER:-changes in the frequencies of alleles
natural selection - CORRECT ANSWER:-the differential reproduction of
phenotype
continuous variations (evolution) - CORRECT ANSWER:-characterized by small
gradations between individuals
and Answers 100% Pass
nondisjunction - CORRECT ANSWER:-failure of chromosomes to separate
during anaphase 1
translocation - CORRECT ANSWER:-the transfer of a portion of one
chromosome to another, usually nonhomologous, chromosome
triple x syndrome - CORRECT ANSWER:-the individual will develop into a
normal-appearing female, but may be sterile and/or mentally retarded. XXX; two
Barr bodies; female
Klinefelter's syndrome - CORRECT ANSWER:-during early development he
amerals normal, but abnormalities become apparent at puberty. testes do not fully
develop, usually taller than average, his muscular development may be somewhat
feminine, breast development may occur, may have a higher voice and female
appearance. XXY; one Barr body; male
Turner's syndrome - CORRECT ANSWER:-she appears normal during early
development, but at puberty does not menstruate, breasts don't develope, and no
eggs are produced. OX; no Barr bodies, female.
,Jacob's syndrome - CORRECT ANSWER:-an individual appears to be sexually
normal. XYY; no Barr bodies, male
autosomal non-disjunction - CORRECT ANSWER:-non-disjunction in
chromosomes other than sex chromosomes
down syndrome - CORRECT ANSWER:-three number 21 chromosomes are
present. individuals are characterize by a fold of the upper eyelid, short stature,
broad hands, stubby feet, a wide round face, a large tongue, and mental retardation
trisomy 18 - CORRECT ANSWER:-this syndrome involves an extra chromosome
18. individuals are characterized
each DNA molecule consists of... - CORRECT ANSWER:-a sugar (deoxyribose),
a phosphate, and a nitrogenous base
the 4 nitrogenous bases - CORRECT ANSWER:-adenine, guanine, cytosine, and
thymine
mutation (related to DNA) - CORRECT ANSWER:-changes in the nucleotide
sequence
why is DNA stable - CORRECT ANSWER:-pyrimadines always pair specifically
with a larger purine
pyrimadines - CORRECT ANSWER:-thymine and cytosine
purines - CORRECT ANSWER:-adenine and guanine
, The chains of DNA are arranged in what way? - CORRECT ANSWER:-
antiparallel (5'-3' and 3'-5')
template strand - CORRECT ANSWER:-the strand of DNA that acts as a pattern
for the formation of a complementary strand to be made
complementary strand - CORRECT ANSWER:-the replicated strand that is
created from the pattern of the template strand
stop codons - CORRECT ANSWER:-UAA; UAG; UGA;
point mutations - CORRECT ANSWER:-small changes in DNA, such as base
substitutions/additions/deletions, but may have profound effects on the protein
formed by the gene, depending on where it occurs
sickle-cell anemia - CORRECT ANSWER:-a genetic disease cause by a base
substitution in the DNA of the gene coding for one of the polypeptides that makes
up hemoglobin. It is recessive.
alleles - CORRECT ANSWER:-alternative forms of the same gene (genotype) in a
gene pool
evolution - CORRECT ANSWER:-changes in the frequencies of alleles
natural selection - CORRECT ANSWER:-the differential reproduction of
phenotype
continuous variations (evolution) - CORRECT ANSWER:-characterized by small
gradations between individuals
