QUESTION 1 A scientist working in a Drosophila lab locates a mutation that has c

Q: QUESTION 1 A scientist working in a Drosophila lab locates a mutation that has c

1)true ,hoemotic gene control the fate of segment 2)d, have a large number of transcription factor that form alpha helix alpha 3)b 6)e 7)true homeoselector gene regulate translation 8)a signal for development of anterior ends like head 9)e 10)d

ID: 66326 • Letter: Q

Question

QUESTION 1

A scientist working in a Drosophila lab locates a mutation that has caused the hind wings to be transformed into fore wings. She determines that this is a homeotic transformation. Do you agree?

True

False

QUESTION 2

The 60 amino acid homeodomain found in homeobox proteins encodes:___________ .

A. A zinc-finger.

B. An ATP-binding domain.

C. A protease.

D. A helix-turn-helix motif.

E. A leucine zipper.

QUESTION 3

Genes with products provided by the female to the egg are called:____________ .

A. Paternal-effect genes.

B. Maternal-effect genes.

C. Embryo-specific genes.

D. Egg-specific genes.

E. Sex-linked genes.

QUESTION 4

The pre-mRNAs for Sex-lethal, transformer and doublesex are:____________.

A. Longer in males.

B. Identical in length in both sexes.

C. Shorter in females.

D. Longer in females.

E. Shorter in males.

QUESTION 5

A mutation that inactivates the sex-lethal protein in fruit flies would cause:____________.

A. A fly with no ventral side.

B. Genetically male flies to develop a female phenotype.

C. A fly with two heads.

D. A fly with no dorsal side.

E. Genetically female flies to develop a male phenotype.

QUESTION 6

Name the gene product that induces development of the apical epidermal ridge (AER) in vertebrate limb buds.

A. Giant

B. Sonic Hedgehog

C. Fibroblast growth factor

D. Cactus

E. Nanos

QUESTION 7

mRNA transcripts for Hox genes are expressed at uniform levels throughout the fruit fly embryo, but are only translated into protein in the segments they regulate.

True

False

QUESTION 8

The maternal-effect Bicoid gene codes for:_____________ .

A. A signal protein.

B. A DNA-binding transcription factor.

C. A cell-to-cell junction protein

D. A transmembrane protein.

E. A serine protease.

QUESTION 9

In Drosophila melanogaster, Hox genes are:___________________ .

A. Clustered together in two gene complexes.

B. Evenly distributed throughout the genome.

C. Clustered in one large gene complex.

D. Clustered together in three gene complexes.

E. Clustered into operons.

QUESTION 10

The class of genes required for establishing the anteroposterior axis is:____________ .

A. The maternal-effect genes.

B. The gap genes.

C. The segment polarity genes.

D. The hox genes.

E. The pair-rule genes.

Explanation / Answer

1)true ,hoemotic gene control the fate of segment

2)d, have a large number of transcription factor that form alpha helix alpha

3)b

6)e

7)true homeoselector gene regulate translation

8)a signal for development of anterior ends like head

9)e

10)d

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QUESTION 1 A scientist working in a Drosophila lab locates a mutation that has c

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