Question 1

Immediately at the moment when a sperm cell fertilises an egg(but before the cell can be called a zygote), how many chromatidsare present in the cellular structure?

Select one:

a. 23

b. 46

c. 92

d. 69

Question 2

Which structure in a blastocyst which eventually develops intothe chorion and placenta?

Select one:

a. Trophoblast

b. Inner cell mass

c. Nurse cell mass

d. Uterine lining

Question 3

What is determined first during prenatal development,chromosomal sex, gonadal sex, or where the anterior region islocated?

Select one:

a. Chromosomal sex

b. Gonadal sex

c. Anterior region’s location

Question 4

Which of the following proteins is produced the first duringdevelopment?

Select one:

a. Hox1

b. SRY

c. MIS hormone

d. Androgen receptor

Question 5

What do the MyoD and Hox6 genes have in common?

Select one:

a. Both are only transcribed in muscle tissue

b. Both encode proteins that themselves are transcriptionfactors

c. Both are expressed in a segmented manner

d. Both are only transcribed during embryogenesis

Question 6

What is particular about bicoid mRNA?

Select one:

a. The egg cell receives this mRNA from Nurse cells beforefertilization

b. The mRNA for bicoid can only be translated by ribosomes fromthe spermatozoa

c. The mRNA for bicoid is only translated in the cytosol

Question 7

What is the difference between polarity and segmentation?

Select one:

a. Polarity describes a relative location, while segments arefixed positions

b. Polarity is established by gene expression regulation, whilesegmentation is regulated by epigenetics

c. Polarity exists throughout an organism, while segmentationonly applies to individual cells

d. Polarity describes the body, while segmentation describesappendages (limbs)