ANSC 3040 Midterm Exam Questions
With Correct Answers
is the biological sex of an embryo already determined? - CORRECT
| | | | | | | | | | |
ANSWER✔✔-yes because it will always contain an XX or XY | | | | | | | | |
When do the forming sperm cells go from 2n (XY) to n (X or Y) -
| | | | | | | | | | | | | | | |
CORRECT ANSWER✔✔-the secondary spermatocyte is the first cell that
| | | | | | | | |
isn't 2n in the spermatogenesis
| | | |
what are diploid and haploid cells - CORRECT ANSWER✔✔-diploid = 2n
| | | | | | | | | |
haploid = n | |
are somatic and germ cells diploid or haploid cells - CORRECT
| | | | | | | | | | |
ANSWER✔✔-diploid
What are totipotent cells - CORRECT ANSWER✔✔-cells capable to
| | | | | | | | |
differentiate into any type of embryonic (body) or extra-embryonic
| | | | | | | | |
(placenta) cells |
,what are trophectoderm cells - CORRECT ANSWER✔✔-multipotent cells
| | | | | | |
capable to differentiate into any type of cells within a cell lineage, in this
| | | | | | | | | | | | | |
case, placental cells
| | |
What are pluripotent cells - CORRECT ANSWER✔✔-cells capable to
| | | | | | | | |
differentiate into any type of cells in the embryo
| | | | | | | |
where can you find pluripotent cells - CORRECT ANSWER✔✔-in the
| | | | | | | | | |
inner cell mass of the blastocyst
| | | | |
What are the levels of early embryogenesis? (3) - CORRECT
| | | | | | | | | |
ANSWER✔✔-1. highly specialized cells - oocyte and sperm which then | | | | | | | | | |
gets fertilized
| |
2. totipotent cells which forms the zygote
| | | | | |
3. blastocyst cells which contains the inner cell mass and the
| | | | | | | | | | |
trophectoderm
what causes cells to become a liver or an intestine if they all contain the
| | | | | | | | | | | | | | |
same DNA? - CORRECT ANSWER✔✔-Their epigenetics and the
| | | | | | | |
differentiation of markers. Modifications of DNA or transcription of
| | | | | | | | |
different areas of the DNA leads to the cell becoming something more
| | | | | | | | | | | |
specialized
,What is gastrulation - CORRECT ANSWER✔✔-the formation of the 3
| | | | | | | | | |
layers - ectoderm, mesoderm, and endoderm.
| | | | |
How does gastrulation work (3) - CORRECT ANSWER✔✔-1. the inner cell
| | | | | | | | | |
mass contains the epiblast and hypoblast
| | | | | |
2. within the epiblast, a primitive streak will release cells and form a
| | | | | | | | | | | | |
mesoderm
3. the epiblast becomes the ectoderm, the mesoderm was just formed,
| | | | | | | | | | |
and the hypoblast becomes the endoderm
| | | | |
Where will the epiblast cells differentiate in the inner cell mass -
| | | | | | | | | | | |
CORRECT ANSWER✔✔-the ones that are attached to the blastocoele
| | | | | | | |
What does the endoderm form - CORRECT ANSWER✔✔-digestive
| | | | | | | |
system, lungs, and endocrine system
| | | |
what does the mesoderm form - CORRECT ANSWER✔✔-Muscle,
| | | | | | | |
Skeleton, Cardiovascular system, reproductive system, urinary system
| | | | | |
what does the ectoderm form - CORRECT ANSWER✔✔-nervous system,
| | | | | | | | |
skin, hair, external parts of the reproductive tract
| | | | | | |
What cell type will develop the repro and urinary system - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-somitic mesoderm |
, what are the founder cells for the germline in animals as embryos?
| | | | | | | | | | | |
where are they found? - CORRECT ANSWER✔✔-Primordial germ cells.
| | | | | | | | |
located in the hind gut | | | |
How and where do the primordial germ cells migrate during
| | | | | | | | | |
embryogenesis? what signal coordinates this migration? - CORRECT | | | | | | | |
ANSWER✔✔-migrate by amoeboid movement via the dorsal mesentery | | | | | | | |
of the hindgut to the gonadal ridge
| | | | | | |
chemotaxis signalling |
Why do primordial germ cells go to the gonadal ridge - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-this is where the primitive sex cords are formed | | | | | | | |
what do the Gonads become in embryogenesis - CORRECT
| | | | | | | | |
ANSWER✔✔-become the testes or the ovaries | | | | |
what do the metanephros become - CORRECT ANSWER✔✔-kidneys
| | | | | | |
What gene does the Y chromosome have that the X doesn't - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-the SRY gene (sex determining region on the Y | | | | | | | | |
chromosome)
With Correct Answers
is the biological sex of an embryo already determined? - CORRECT
| | | | | | | | | | |
ANSWER✔✔-yes because it will always contain an XX or XY | | | | | | | | |
When do the forming sperm cells go from 2n (XY) to n (X or Y) -
| | | | | | | | | | | | | | | |
CORRECT ANSWER✔✔-the secondary spermatocyte is the first cell that
| | | | | | | | |
isn't 2n in the spermatogenesis
| | | |
what are diploid and haploid cells - CORRECT ANSWER✔✔-diploid = 2n
| | | | | | | | | |
haploid = n | |
are somatic and germ cells diploid or haploid cells - CORRECT
| | | | | | | | | | |
ANSWER✔✔-diploid
What are totipotent cells - CORRECT ANSWER✔✔-cells capable to
| | | | | | | | |
differentiate into any type of embryonic (body) or extra-embryonic
| | | | | | | | |
(placenta) cells |
,what are trophectoderm cells - CORRECT ANSWER✔✔-multipotent cells
| | | | | | |
capable to differentiate into any type of cells within a cell lineage, in this
| | | | | | | | | | | | | |
case, placental cells
| | |
What are pluripotent cells - CORRECT ANSWER✔✔-cells capable to
| | | | | | | | |
differentiate into any type of cells in the embryo
| | | | | | | |
where can you find pluripotent cells - CORRECT ANSWER✔✔-in the
| | | | | | | | | |
inner cell mass of the blastocyst
| | | | |
What are the levels of early embryogenesis? (3) - CORRECT
| | | | | | | | | |
ANSWER✔✔-1. highly specialized cells - oocyte and sperm which then | | | | | | | | | |
gets fertilized
| |
2. totipotent cells which forms the zygote
| | | | | |
3. blastocyst cells which contains the inner cell mass and the
| | | | | | | | | | |
trophectoderm
what causes cells to become a liver or an intestine if they all contain the
| | | | | | | | | | | | | | |
same DNA? - CORRECT ANSWER✔✔-Their epigenetics and the
| | | | | | | |
differentiation of markers. Modifications of DNA or transcription of
| | | | | | | | |
different areas of the DNA leads to the cell becoming something more
| | | | | | | | | | | |
specialized
,What is gastrulation - CORRECT ANSWER✔✔-the formation of the 3
| | | | | | | | | |
layers - ectoderm, mesoderm, and endoderm.
| | | | |
How does gastrulation work (3) - CORRECT ANSWER✔✔-1. the inner cell
| | | | | | | | | |
mass contains the epiblast and hypoblast
| | | | | |
2. within the epiblast, a primitive streak will release cells and form a
| | | | | | | | | | | | |
mesoderm
3. the epiblast becomes the ectoderm, the mesoderm was just formed,
| | | | | | | | | | |
and the hypoblast becomes the endoderm
| | | | |
Where will the epiblast cells differentiate in the inner cell mass -
| | | | | | | | | | | |
CORRECT ANSWER✔✔-the ones that are attached to the blastocoele
| | | | | | | |
What does the endoderm form - CORRECT ANSWER✔✔-digestive
| | | | | | | |
system, lungs, and endocrine system
| | | |
what does the mesoderm form - CORRECT ANSWER✔✔-Muscle,
| | | | | | | |
Skeleton, Cardiovascular system, reproductive system, urinary system
| | | | | |
what does the ectoderm form - CORRECT ANSWER✔✔-nervous system,
| | | | | | | | |
skin, hair, external parts of the reproductive tract
| | | | | | |
What cell type will develop the repro and urinary system - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-somitic mesoderm |
, what are the founder cells for the germline in animals as embryos?
| | | | | | | | | | | |
where are they found? - CORRECT ANSWER✔✔-Primordial germ cells.
| | | | | | | | |
located in the hind gut | | | |
How and where do the primordial germ cells migrate during
| | | | | | | | | |
embryogenesis? what signal coordinates this migration? - CORRECT | | | | | | | |
ANSWER✔✔-migrate by amoeboid movement via the dorsal mesentery | | | | | | | |
of the hindgut to the gonadal ridge
| | | | | | |
chemotaxis signalling |
Why do primordial germ cells go to the gonadal ridge - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-this is where the primitive sex cords are formed | | | | | | | |
what do the Gonads become in embryogenesis - CORRECT
| | | | | | | | |
ANSWER✔✔-become the testes or the ovaries | | | | |
what do the metanephros become - CORRECT ANSWER✔✔-kidneys
| | | | | | |
What gene does the Y chromosome have that the X doesn't - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-the SRY gene (sex determining region on the Y | | | | | | | | |
chromosome)
