Exam 19: Developmental Genetics

A) pair-rule
B) gap
C) maternal effect
D) segment-polarity
E) gap or segment-polarity

Correct Answer

verified

Show Answer

Correct Answer

verified

Show Answer

A) Bicoid, Gap, Homeotic
B) Homeotic, Gap, Bicoid
C) Homeotic, Bicoid,Gap
D) These genes are not expressed at different times during development. They are expressed at the same time, but in a different spatial order.
E) Kruppel, gooseberry, even-skipped

Correct Answer

verified

Show Answer

Correct Answer

verified

Show Answer

A) will always form the same structures in adult flies.
B) can form different structures, depending on positional information received by the segment during early development.
C) is only important to early developmental stages.
D) will express different transcription factors in different individuals.
E) will become ectoderm, endoderm, or mesoderm.

Correct Answer

verified

Show Answer

A) suspensor
B) shoot meristem
C) basal region
D) central region
E) apical meristem

Correct Answer

verified

E

A) A hunchback mutation that inhibits Hunchback production.
B) A hunchback mutation that causes Hunchback overproduction.
C) A maternal effect gene mutation that inhibits the production of a maternal gene product.
D) A segmentation gene mutation that inhibits production of a segmentation gene product.
E) A segmentation gene mutation that causes the overproduction of a segmentation gene product.

Correct Answer

verified

A

A) can undergo mitosis.
B) can differentiate into more than one type of specialized cell.
C) vary in their potency.
D) are only found in embryos.
E) can sometimes only differentiate into one cell type.

Correct Answer

verified

Show Answer

A) They encode transcription factors.
B) They are the only types of genes that contain a region of DNA called the homeobox.
C) They are found in clusters called complexes.
D) A portion of the proteins they encode can bind DNA.
E) They activate developmental genes.

Correct Answer

verified

Show Answer

A) they express a different set of genes during development.
B) they possess different genes.
C) they arise from different embryonic stem cells.
D) they express different transcription factors.
E) they express different genes and different transcription factors during development.

Correct Answer

verified

Show Answer

Correct Answer

verified

False

A) the plant will die.
B) the plant will only develop to the heart stage.
C) the plant will not develop cotyledons.
D) the plant will develop leaves instead of flowers.
E) the plant will develop flowers instead of leaves.

Correct Answer

verified

Show Answer

Correct Answer

verified

Show Answer

A) offspring with no head
B) offspring with no spiracles
C) offspring with two heads and no spiracles
D) offspring with the location of the head and spiracles reversed
E) offspring with no head and two spiracles

Correct Answer

verified

Show Answer

A) eliminating all the gene candidates that were expressed in both muscle and nonmuscle cells.
B) finding all the genes that were expressed in common between two different muscle cell lines.
C) cloning all the genes that were expressed in muscle cell lines to determine if any of these genes . could cause nonmuscle cells to differentiate into muscle cells.
D) mutating genes expressed only in muscle cells to see if differentiation could be prevented.

Correct Answer

verified

Show Answer

A) A morphogen will only elicit effects in areas where it is at a high enough concentration.
B) Morphogens are distributed asymmetrically throughout the cell.
C) Morphogens can be secreted to act on neighboring cells.
D) Morphogens can cause cell death.
E) None of these choices are incorrect, they are all characteristics of morphogens.

Correct Answer

verified

Show Answer

A) D,G,A,E,C,F,B
B) G,D,E,A,C,F,B
C) D,G,A,E,F,C,B
D) D,G,A,E,B,C,F
E) G,D,A,E,F,C,B

Correct Answer

verified

Show Answer

A) abdomen
B) thorax
C) head
D) head or thorax
E) bithorax complex

Correct Answer

verified

Show Answer