Transcript Concept Check Questions

Chapter 13
Meiosis and Sexual Life Cycles
Concept Check Questions
Offspring acquire genes from parents by
inheriting chromosomes
How are the traits of parents
(such as hair color) transmitted
to their offspring?
Concept Check Questions
Offspring acquire genes from parents by
inheriting chromosomes
How are the traits of parents
(such as hair color) transmitted
to their offspring?
Concept Check Questions
Offspring acquire genes from parents by
inheriting chromosomes
In the absence of mutation,
asexually reproducing organisms
produce offspring that are
genetically identical to each
other and to their parents.
Explain.
Concept Check Questions
Offspring acquire genes from parents by
inheriting chromosomes
In the absence of mutation,
asexually reproducing organisms
produce offspring that are
genetically identical to each
other and to their parents.
Explain.
Concept Check Questions
Offspring acquire genes from parents by
inheriting chromosomes
In organisms that reproduced
sexually, how similar are the
offspring to their parents?
Explain.
Concept Check Questions
Offspring acquire genes from parents by
inheriting chromosomes
In organisms that reproduced
sexually, how similar are the
offspring to their parents?
Explain.
50%
Concept Check Questions
Offspring acquire genes from parents by
inheriting chromosomes
In organisms that reproduced
sexually, how similar are the
offspring to their parents?
Explain.
50%
Concept Check Questions
Offspring acquire genes from parents by
inheriting chromosomes
In organisms that reproduced
sexually, how similar are the
offspring to their parents?
Explain.
50%
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
How does the karyotype of a
human female differ from that of
a human male?
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
How does the karyotype of a
human female differ from that of
a human male?
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
How does the alternation of
meiosis and fertilization in the
life cycles of sexually
reproducing organisms maintain
the normal chromosome count
for each species?
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
diploid
diploid
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
diploid
meiosis
haploid
haploid
meiosis
diploid
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
diploid
meiosis
haploid
fertilization
haploid
meiosis
diploid
diploid
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
Dog sperm contain 39
chromosomes. What are the
haploid number and diploid
number for dogs?
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
Dog sperm contain 39
chromosomes. What are the
haploid number and diploid
number for dogs?
n=39
2n=78
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
What process (meiosis or
mitosis) is more directly involved
in the production of gametes in
animals? In plants & most fungi?
Concept Check Questions
Fertilization and meiosis alternate in
sexual life cycles
What process (meiosis or
mitosis) is more directly involved
in the production of gametes in
animals? In plants & most fungi?
meiosis
mitosis
Concept Check Questions
Meiosis reduces the number of chromosome
sets from diploid to haploid
Using the concept of
chromosome sets, explain briefly
how mitosis conserves
chromosome number, whereas
meiosis reduces the number of
chromosomes by half.
Concept Check Questions
Meiosis reduces the number of chromosome
sets from diploid to haploid
mitosis
2
sets
4
sets
2
sets
2
sets
Concept Check Questions
1
Meiosis reduces the number of chromosome
set
sets from diploid to haploid
meiosis
2
sets
4
sets
2
sets
2
sets
1
set
1
set
1
set
Concept Check Questions
Meiosis reduces the number of chromosome
sets from diploid to haploid
How are the chromosomes in a
cell at metaphase of mitosis
similar to and different from the
chromosomes in a cell at
metaphase of meiosis II?
Concept Check Questions
Meiosis reduces the number of chromosome
sets from diploid to haploid
How are the chromosomes in a
cell at metaphase of mitosis
similar to and different from the
chromosomes in a cell at
metaphase of meiosis II?
Twice as many,
otherwise identical
Concept Check Questions
Genetic variation produced in sexual
life cycles contributes to evolution
Fruit flies have a diploid number of 8,
and honeybees have a diploid number of
32. Assuming no crossing over, is the
genetic variation among offspring from
the same two parents likely to be greater
in fruit flies or in honeybees? Explain.
Concept Check Questions
Genetic variation produced in sexual
life cycles contributes to evolution
Fruit flies have a diploid number of 8,
and honeybees have a diploid number of
32. Assuming no crossing over, is the
genetic variation among offspring from
the same two parents likely to be greater
in fruit flies or in honeybees? Explain.
32
2
>
8
2
Concept Check Questions
Genetic variation produced in sexual
life cycles contributes to evolution
Under what circumstances would
crossing over during meiosis not
contribute to genetic variation
among daughter cells?
Concept Check Questions
Genetic variation produced in sexual
life cycles contributes to evolution
Under what circumstances would
crossing over during meiosis not
contribute to genetic variation
among daughter cells?
Parent is homozygous
for every gene.
.