bio 1201 gregg exam 3 QUESTIONS &
ANSWERS 100% CORRECT!!
the units of heredity and are made up of segments of DNA - ANSWERgenes
each pair of homologous chromosomes includes... - ANSWERone chromosome from
each parent
what does meiosis result in - ANSWER4 haploid daughter cells
what does meiosis 1 do - ANSWERseparates homologous chromosomes
when does crossing over and synapsis occur - ANSWERprophase 1
how many chromosomes do humans have in the nucleus of their somatic cells? -
ANSWER46 chromosomes (23 pairs)
the two chromosomes in each pair are called... - ANSWERhomologous
chromosomes/homologs
what does meiosis 2 do - ANSWERseparates sister chromatids
mitosis vs meiosis - ANSWERMitosis: one division forming 2 identical cells (clones);
Meiosis: two divisions forming 4 genetically different cells
meiosis 2 is similar to mitosis because... - ANSWERsister chromatids separate
how do different alleles occur - ANSWERthrough mutation
what 3 things contribute to genetic variation - ANSWERcrossing over, independent
assortment, random fertilization
when does independent assortment occur? - ANSWERmetaphase I of meiosis
random fertilization - ANSWERany sperm can fertilize any egg
the mating of 2 true-breeding varieties - ANSWERhybridization
p generation - ANSWERtrue-breeding parents
f1 generation - ANSWERhybrid offspring of the P generation
f2 generation - ANSWERoffspring of the F1 generation
alternative versions of a gene - ANSWERalleles
the specific spot where a gene resides on a chromosome - ANSWERlocus
, two alleles for a heritable character separate during gamete formation and end up in
different gametes - ANSWERlaw of segregation
organism with two identical alleles for a character - ANSWERhomozygote
organism with two different alleles for a gene - ANSWERheterozygote
to determine the genotype, breed the mystery individual with a homozygous
recessive individual - ANSWERtestcross
crossing two true-breeding parents differing in two characters produces ______ in
the F1 generation, heterozygous for both characters - ANSWERdihybrids
a cross between F1 which can determine whether two characters are transmitted to
offspring as a package or independently is called? - ANSWERa dihybrid cross
law of independent assortment - ANSWEReach pair of alleles segregates
independently of any other pair of alleles during gamete formation
do genes located near each other on the same chromosome tend to be inherited
together? - ANSWERyes
occurs when phenotypes of the heterozygote and dominant homozygote are
identical - ANSWERcomplete dominance
the phenotype of F1 hybrids is somewhere between the phenotypes of the two
parental varieties - ANSWERincomplete dominance
x inactivation - ANSWER-in females, one of the X chromosomes is randomly
inactivated, and forms a Barr Body
genes that are located on the same chromosome tend to be inherited together and
are called... - ANSWERlinked genes
pairs of homologous chromosomes do not separate normally during meiosis -
ANSWERnondisjunction
results from the fertilization of gametes in which nondisjunction occurred -
ANSWERaneuploidy
two dominant alleles affect the phenotype in separate, distinguishable ways -
ANSWERcodominance
when one gene has multiple phenotypic effects - ANSWERpleiotropy
what hereditary diseases are caused by pleiotropic alleles - ANSWERcystic fibrosis
and sickle-cell disease
ANSWERS 100% CORRECT!!
the units of heredity and are made up of segments of DNA - ANSWERgenes
each pair of homologous chromosomes includes... - ANSWERone chromosome from
each parent
what does meiosis result in - ANSWER4 haploid daughter cells
what does meiosis 1 do - ANSWERseparates homologous chromosomes
when does crossing over and synapsis occur - ANSWERprophase 1
how many chromosomes do humans have in the nucleus of their somatic cells? -
ANSWER46 chromosomes (23 pairs)
the two chromosomes in each pair are called... - ANSWERhomologous
chromosomes/homologs
what does meiosis 2 do - ANSWERseparates sister chromatids
mitosis vs meiosis - ANSWERMitosis: one division forming 2 identical cells (clones);
Meiosis: two divisions forming 4 genetically different cells
meiosis 2 is similar to mitosis because... - ANSWERsister chromatids separate
how do different alleles occur - ANSWERthrough mutation
what 3 things contribute to genetic variation - ANSWERcrossing over, independent
assortment, random fertilization
when does independent assortment occur? - ANSWERmetaphase I of meiosis
random fertilization - ANSWERany sperm can fertilize any egg
the mating of 2 true-breeding varieties - ANSWERhybridization
p generation - ANSWERtrue-breeding parents
f1 generation - ANSWERhybrid offspring of the P generation
f2 generation - ANSWERoffspring of the F1 generation
alternative versions of a gene - ANSWERalleles
the specific spot where a gene resides on a chromosome - ANSWERlocus
, two alleles for a heritable character separate during gamete formation and end up in
different gametes - ANSWERlaw of segregation
organism with two identical alleles for a character - ANSWERhomozygote
organism with two different alleles for a gene - ANSWERheterozygote
to determine the genotype, breed the mystery individual with a homozygous
recessive individual - ANSWERtestcross
crossing two true-breeding parents differing in two characters produces ______ in
the F1 generation, heterozygous for both characters - ANSWERdihybrids
a cross between F1 which can determine whether two characters are transmitted to
offspring as a package or independently is called? - ANSWERa dihybrid cross
law of independent assortment - ANSWEReach pair of alleles segregates
independently of any other pair of alleles during gamete formation
do genes located near each other on the same chromosome tend to be inherited
together? - ANSWERyes
occurs when phenotypes of the heterozygote and dominant homozygote are
identical - ANSWERcomplete dominance
the phenotype of F1 hybrids is somewhere between the phenotypes of the two
parental varieties - ANSWERincomplete dominance
x inactivation - ANSWER-in females, one of the X chromosomes is randomly
inactivated, and forms a Barr Body
genes that are located on the same chromosome tend to be inherited together and
are called... - ANSWERlinked genes
pairs of homologous chromosomes do not separate normally during meiosis -
ANSWERnondisjunction
results from the fertilization of gametes in which nondisjunction occurred -
ANSWERaneuploidy
two dominant alleles affect the phenotype in separate, distinguishable ways -
ANSWERcodominance
when one gene has multiple phenotypic effects - ANSWERpleiotropy
what hereditary diseases are caused by pleiotropic alleles - ANSWERcystic fibrosis
and sickle-cell disease
