Nucleus Flashcards
where does active chromatin stain lightly?
euchromatin
where does inactive chromatin stain darkly?
heterochromatin
where do rRNA transcription and ribosomal subunit assembly occur?
nucleolus
when does one diploid progenitor cell produce 2 diploid daughter cells through the divisional process?
mitosis
what are the steps of interphase?
G1 - growth and DNA replication prep
G0 - quiescence
S - DNA replicatin
G2 - mitosis prep
which phase does nucleoli disappear, chromatin condenses into chromosomes, sister chromatids join at centromere, centromeres migrate to opposite poles, nuclear lamina and nuclear pore complex dissociate?
prophase
which phase do chromosomes condense further, kinectochores at each centromere attach to mitotic spindle, chromosomes align on metaphase plate?
metaphase
which phase do sister chromatids separate and chromosomes move toward opposite spindle poles?
anaphase
which phase do chromosomes condense, spindle dissociates, nuclear envelope reforms, cleavage furrow forms?
telophase
when does 1 diploid progenitor cell become 4 haploid daughter cells?
meiosis
how is meiosis I different from mitosis?
synapsis and crossing over occurs in meiosis I
when does crossing over occur?
prophase meiosis I
which process produces diploid cells?
mitosis
which process is good for tissue growth and repair throughout the body?
mitosis
which process produces haploid cells?
meiosis
which process is good for formation of gametes?
meiosis
which process is visualized in a histopath slide?
mitosis
what genetic condition is caused by an abnormal chromosomal count, commonly miscarried?
aneuploidies
most common human autosomal aneuploidies
- 21 (Down syndrome)
- 18 (Edwards syndrome)
- 13 (Patau syndrome)
what syndrome causes taller, normal fertility, some learning disabilities, increased interocular distance, and no symptoms?
XXX (Triple X syndrome)
which syndrome causes taller, normal fertility, some learning disabilities, never diagnosed?
XYY-XYY (Double Y syndrome)
which syndrome causes taller, sterile, smaller testicles, decreased body hair, lower libido, some learning disabilities?
XXY (Klinefelter syndrome)
which syndrome causes shorter, low set ears, webbed neck, can only become pregnant with intervention, normal intelligence?
X0 (Turner syndrome)
