Biology 8.11-8.17 mastering q's
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22 Terms
Homologous chromosomes
are identical in the arrangement of their genes, but some versions of the genes may differ between the chromosomes. Same size and shape
How many pairs of autosomes do humans have?
22 and a pair of sex chromosomes
what is the female sex hormone indicated as?
xx for female and xy for male
can an organism be haploid?
yes, its called a haploid organism bc all its cells are haploid
example of a cell that is 2n is ____
somatic cell
Meiosis I produces _____ cells, each of which is _____.
two, haploid
Meiosis II typically produces _____ cells, each of which is _____.
four, haploid
During _____ sister chromatids separate.
anaphase II in meiosis and anaphase in mitosis
At the end of _____ and cytokinesis, haploid cells contain chromosomes that each consist of two sister chromatids.
telophase one in meiosis
synapsis occurs during what phase of meiosis
prophase. its the pairing of homologous chromosomes
Homologous chromosomes migrate to opposite poles during _____.
anaphase 1 of meiosis
During _____ chromosomes align single file along the equator of a haploid cell.
metaphase 2 of meiosis
During _____ a spindle forms in a haploid cell.
prophase 2 of meiosis
At the conclusion of meiosis I, the daughter cells are _____.
haploid and the sister chromatids are joined
In meiosis II…
sister chromatids separate
The function of meiosis is to make __________.
four cells with a haploid number of chromosomes
in anaphase one of meiosis, what separates and moves to either pole?
homologous chromosomes
Fertilization joins _____ to produce a _____.
haploid gametes, diploid zygote
synapsis
pairing of homologous chromosmes that only occurs in meioisis prophase 1
The exchange of parts between nonhomologous chromosomes is called _____.
reciprocal translocation
If a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place but in the reverse direction, the resulting chromosomal abnormality is called _____.
an inversion
what is a tetrad