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25 Cards in this Set

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Which of the following steps would NOT lead to variation of genetic material?
A. Crossing over non-sister chromatids
B. Crossing over of sister chromatids
C. The alignment of the chromosomes during metaphase I
D. The combination of sperm and egg genes
Crossing over of sister chromatids
Which of the following is NOT a difference between anaphase I and anaphase II?
A. Each chromosome is composed of 2 chromatids in anaphase I and only one chromatid in anaphase II
B. Anaphase I occurs in a haploid cell while anaphase II occurs in a diploid cell
C. Sister chromatids seperate during anaphase II while homologous chromosomes seperate during anaphase I
D. The cell undergoing anaphase II is genetically different from what it conatined while undergoing anaphase I
Anaphase I occurs in a haploid cell while anaphase II occurs in a diploid cell
If a sperm cell contains 8 chromosomes, it comes from an animal that has ____ chromosomes
A. 4
B. 12
C.16
D.24
16
The term build from the freek root wordsmeaning "corresponding" or "agreeing" is
A. Tetrad
B. Homologous
C. Haploid
D. Diploid
E. Chromatid
Homologous
The term synapsis is built from the Greek root word meaning
A. Divided
B. Two
C. Summarized
D. Gene
E. Joined together
Joined together
If a cell conatins 12 chromosomes at the end of meiosis I, how many chromosomes will the daughter cells contain at the end of meiosis II?
A. 3
B. 6
C. 12
D. 24
12
A synaptonemal complex is
A. The internal structure of nucleoprotein that makes up a chromosome
B. A nucleoprotein lattice that forms between homologues in a chiasmata
C. The spindle fibers that attach to homologous chromosomes during meiosis
D. The spindle fibers that attach from pole to pole without binding chromosomes
E. The set of cells produced from a single original parent cell in oogenesis
A nucleoprotein lattice that forms between homologues in chiasmata
What does the term "chiasma" refer?
A. The process of fertilization
B. The life cycle of a fungus
C. The process of crossing-over
D. A structure that holds together homologues during cross-over
E. The period between meiosis I and meiosis II
A structure that holds together homologues during crossing-over
During which stage of meiosis does homologue seperation occur?
A. Prophase I
B. Anaphase I
C. Telophase I
D. Prophase II
E. Anaphase II
Anaphase I
Which statement is NOT true about homologues in meiosis I?
A. Homologous chromosomes pair to form a tetrad
B. Homologous CHROMOSOMES SEPERATE AND GO TO DIFFERENT DAUGHTER CELLS
C. Each Homologue's centromerte splitsto form two chromosomes
D. Homologues exchange genetic material between non-sister chromatids
E. Homologues interact with the spindle as if they were one chromosome
Each homologue's centromere splits to form two chromosomes
Interkinesis is different from interphase in which way?
A. Interkinesis occurs after a cell finishes a nuclear division
B. Interkinesis is the stage that precedes a prophase stage
C. Interphase involves DNA replication and interkinesis does not
D. Interkinesis can be variable in length
Interphase involves DNA replication and interkinesis does not
The events of meiosis II are most similar to
A. Mitosis
B. Meiosis I
C. Interphase
D. Interkinesis
Mitosis
Which is NOT true about daughter cells of mitosis and meiosis?
A. In meiosis, daughter cells are haploid
B. In meiosis, there are four daughter cells
C. In mitosis, there are two daughter cells
D. In mitosis, the dauhgter cells are genetically identical
E. In meiosis, the daughter cells are genetically identical
In meiosis, the daughter cells are genetically identical
The term based on Latin and Greek root words meaning "seed" and "production" is
A. Gametogenesis
B. Oogenesis
C. Pangenesis
D. Spermatogenesis
Spermatogenesis
The term based on the greek root words meaning "egg" and "cell" is
A. Gamete
B. Oocyte
C. Pangenesis
D. Spermatogenesis
E. Polar body
Oocyte
The polar body is
A. Another name for an egg cell
B. A precursor cell that becomes an egg cell
C. A nonfunctional cell rudiment made at the same time as an egg cell
D. The cell produced when fertilization occurs
A nonfunctional cell rudiment made at the same time as an egg cell
Why do polar bodies form?
A. They nurse the egg as it leaves the follicle
D. This is extra chromosomal material respresenting the X chromosome in each female cell
C. Thy orient the sperm toward the egg
D. They allow a reduction in chromosomes while preserving all the food for one egg
E. The orient of the egg for penetration by the sperm
They allow a reduction in chromosomes while preserving all the food for one egg
Species X reproduces asexually by fission and spexies Y reproduces sexually. When the environment gradually changes, then
A. Species X and Y will have an equal chance of surviving
B. Species Y should have a better chance of surviving than species X
C. Species X should have a ebtter chance of surviving than species Y
D. Neither species should have an advantage in surviving since organisms often become extinct when the environment changes
Species Y should have a better chance of surviving than species X
Before the time of Gregor Mendel and genetics, sexual reproduction was thought to produce a blending or equal mixing of the parents' traits. Today we know that
A. Offspring will be identical to one another and demonstrate traits exactly halfway between the parents' traits
B. Offspring can vary from receiving over 99% of one parent's genes to receiving over 99% of the other parent's genes
C. Offspring inherit essentially50% of their genes from each parent, but two sibling offspring may share with eachother from zero to 23 chromosomes in common from each parent
Offspring inherit essentially50% of their genes from each parent, but two sibling offspring may share with eachother from zero to 23 chromosomes in common from each parent
No fertilization occurs, and eggs develope into female lizards. What is the probable evolutionary mechanism for this occuring?
A. The species is probably going extinct
B. The desert is relatively uniform and there is little advantage to maintaining variation, but the animal has not been able to completely avolve away from its heritage of sexual reproduction
C. This switch in mating behavior is direct physical reflection of crossing-over
The desert is relatively uniform and there is little advantage to maintaining variation, but the animal has not been able to completely avolve away from its heritage of sexual reproduction
Sources of genetic variation in a sexually reproducing population include(s) which of the following?
A. Crossing over in prophase I
B. Independent assortment in metaphase I
C. Fertilization
D. All of the choices are sources of genetic variation
All of the choices
In human females, when does meiosis II occur?
A. At ovulation
B. Immediately after the sperm penetration of the secondary oocyte
C. Immediately after the sperm penetrates the primary oocyte
D. None of the choices
Immediately after the sperm penetration of the secondary oocyte
The replication of DNA and the duplication of genes occurs during mitosis
True or false?
False
If DNA replication has already occured, the chromosomes consist of sister chromatids held together at centromere
True or false?
True
Synapsis is when a duplicated chromosome begins to pair with its homologue
True or false?
True