TTU Held BIOL 1402 Exam 2
Questions & Answers (Grade A+)
Karyotpying -
correct answer ✅- a display if micrographs of the metaphase
chromosomes of a cell arranged by size and centimeter position; to
determine of there's an abnormal number of chromosomes (due to
non- disjunction)
a. if we brake open human cells in metaphase of mitosis, stain the
chromosomes with dyes, take a picture with a microscope and
arrange then in matching pairs
Pedigree Analysis -
correct answer ✅- To determine whether a gene is
dominant/recessive and uses Mendel's concept of dominant and
recessive alleles and his law of segregation. ; the X chromosomes
vs. autosomal
Down Syndrome -
correct answer ✅Caused by an extra copy of chromosome 21
("Trisomy 21"); characterized by heart and respiratory defects and
varrining degrees of mental retardation.
Turner Syndrome -
correct answer ✅females lacking an X chromosome ; XO, O refers
to the absence of the other X chromosome. They are short in
,TTU Held BIOL 1402 Exam 2
Questions & Answers (Grade A+)
stature and have webbing around the neck and shoulders but have
normal intelligence. Have only 45 chromosomes but is NOT fatal.
They are sterile
Klinefelter Syndrome -
correct answer ✅a male with an extra X chromosome (XXY or
XXXY) that is sterile and has abnormally small teestes. Often has
more feminine body characteristics. The abnormal sets with more
than three chromosome( sex) are a result of disjunction.
Nondisjunction -
correct answer ✅an accident of meiosis or mitosis in which a pair
of homologous chromosomes or pair of sister chromatids fails to
separate at anaphase; causes down syndrome.
disjunction -
correct answer ✅the normal separation of chromosomes in
meiosis or mitosis
Carrier -
correct answer ✅- Parents are heterozygotes for a recessively
inherited disorder and who therefore does not show any symptoms
of that disorder
,TTU Held BIOL 1402 Exam 2
Questions & Answers (Grade A+)
Amniocentesis -
correct answer ✅- Genetic testing in the fetus
- Requires collection of fetal cells by inserting a needle through the
abdomen into the uterus
- Cells are cultured to allow karyotyping to look for abnormalities
-Inform mother whether the child will have birth defect
Cystic Fibrosis -
correct answer ✅a genetic disease that occurs in people with two
copies of a certain recessive allele characterized by an excessive
secreation of mucus and concequent venerability; fatal if untreated
Achondroplasis -
correct answer ✅a form of human dwarfism caused by a single
dominant allele
Huntingtions Disease -
correct answer ✅A human genetic disorder caused by a dominant
allele, charaterized by uncontrollable body movements and
degeneration of nervous system; usually fatal 10 to 20 years after
the on set of symptoms
, TTU Held BIOL 1402 Exam 2
Questions & Answers (Grade A+)
Alzheimers -
correct answer ✅a from of mental deteroration or dementia;
characterized by confusion or memory loss
Chorionic Villi Sampling -
correct answer ✅- Doctor extracts sample of chorionic villus tissue
from placenta
- Karyotyping results take only 24 hours and can be done earlier
than amniocentesis
Aminocentesis -
correct answer ✅a genetic testing of the fetus to detect the
presence of disease causing alleles in an individual genome. The
test is done by extracting from the fetus with a needle
Heredity -
correct answer ✅Transmission of traits/features from one
generation to the next.
In{her}itance of traits
Questions & Answers (Grade A+)
Karyotpying -
correct answer ✅- a display if micrographs of the metaphase
chromosomes of a cell arranged by size and centimeter position; to
determine of there's an abnormal number of chromosomes (due to
non- disjunction)
a. if we brake open human cells in metaphase of mitosis, stain the
chromosomes with dyes, take a picture with a microscope and
arrange then in matching pairs
Pedigree Analysis -
correct answer ✅- To determine whether a gene is
dominant/recessive and uses Mendel's concept of dominant and
recessive alleles and his law of segregation. ; the X chromosomes
vs. autosomal
Down Syndrome -
correct answer ✅Caused by an extra copy of chromosome 21
("Trisomy 21"); characterized by heart and respiratory defects and
varrining degrees of mental retardation.
Turner Syndrome -
correct answer ✅females lacking an X chromosome ; XO, O refers
to the absence of the other X chromosome. They are short in
,TTU Held BIOL 1402 Exam 2
Questions & Answers (Grade A+)
stature and have webbing around the neck and shoulders but have
normal intelligence. Have only 45 chromosomes but is NOT fatal.
They are sterile
Klinefelter Syndrome -
correct answer ✅a male with an extra X chromosome (XXY or
XXXY) that is sterile and has abnormally small teestes. Often has
more feminine body characteristics. The abnormal sets with more
than three chromosome( sex) are a result of disjunction.
Nondisjunction -
correct answer ✅an accident of meiosis or mitosis in which a pair
of homologous chromosomes or pair of sister chromatids fails to
separate at anaphase; causes down syndrome.
disjunction -
correct answer ✅the normal separation of chromosomes in
meiosis or mitosis
Carrier -
correct answer ✅- Parents are heterozygotes for a recessively
inherited disorder and who therefore does not show any symptoms
of that disorder
,TTU Held BIOL 1402 Exam 2
Questions & Answers (Grade A+)
Amniocentesis -
correct answer ✅- Genetic testing in the fetus
- Requires collection of fetal cells by inserting a needle through the
abdomen into the uterus
- Cells are cultured to allow karyotyping to look for abnormalities
-Inform mother whether the child will have birth defect
Cystic Fibrosis -
correct answer ✅a genetic disease that occurs in people with two
copies of a certain recessive allele characterized by an excessive
secreation of mucus and concequent venerability; fatal if untreated
Achondroplasis -
correct answer ✅a form of human dwarfism caused by a single
dominant allele
Huntingtions Disease -
correct answer ✅A human genetic disorder caused by a dominant
allele, charaterized by uncontrollable body movements and
degeneration of nervous system; usually fatal 10 to 20 years after
the on set of symptoms
, TTU Held BIOL 1402 Exam 2
Questions & Answers (Grade A+)
Alzheimers -
correct answer ✅a from of mental deteroration or dementia;
characterized by confusion or memory loss
Chorionic Villi Sampling -
correct answer ✅- Doctor extracts sample of chorionic villus tissue
from placenta
- Karyotyping results take only 24 hours and can be done earlier
than amniocentesis
Aminocentesis -
correct answer ✅a genetic testing of the fetus to detect the
presence of disease causing alleles in an individual genome. The
test is done by extracting from the fetus with a needle
Heredity -
correct answer ✅Transmission of traits/features from one
generation to the next.
In{her}itance of traits
