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Biology
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23 Nov 2019

2. Dolly the sheep was the clone of an adult sheep. Identify how an adult animal is cloned.

A) A fertilized egg cell is allowed to divide and then the embryo is split into several parts.

B) A haploid egg cell is fertilized by a haploid sperm cell within a female sheep.

C) A diploid egg cell is fertilized by a haploid sperm cell within a female sheep.

D) The haploid nucleus of an egg cell is removed and replaced with the diploid nucleus of a donor cell.

E) The diploid nucleus of an egg cell is removed and replaced with the haploid nucleus of a donor cell.

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Keith Leannon
Keith LeannonLv2
29 Jul 2019
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Related questions

Which statement describes a similarity between the diploid and haploid phases of plant life?

both are multicellular
both are immediately followed by meiosis
both end in fertilization
both contain spores
both contain sporophytes

A zygote is formed ____.​

by the fusion of male and female somatic cells
directly by meiosis in fungi
by the mitotic divisions of spores in plants
by the fusion of egg and sperm nuclei
after a fertilized egg undergoes mitotic divisions to mature

Human skin color is an example of ____, while sickle-cell anemia is an example of ____.​

incomplete dominance; pleiotropy
pleiotropy; polygenic inheritance
incomplete dominance; multiple alleles
polygenic inheritance; pleiotropy
multiple alleles; epistasis

  1. An organism with extensive yolk, such as the chick,

A) has incompletecleavage. D)forms a blastoderm but no blastocoel.

B) has yolk evenly distributed in the egg. E) has completecleavage.

C) fails to synthesize DNA duringcleavage.

  1. Invagination

A) occurs in sea urchins.

B) forms the archenteron in echinoderms.

C) creates unique positions for new cell interactions.

D) requires unique cell movement.

E) All of the above

  1. When the blastopore dorsal lip is grafted from one frog embryoonto a second embryo, the second dorsal lip will

A) change the developmental fate of the surrounding cells.

B) change the polarity of the adjacent segments.

C) cause rapid cell division.

D) block gastrulation.

E) change the prospective potency of the surrounding cells.

  1. Gastrulation in birds differs in many ways from gastrulation infrogs. The main feature that both have in common is that

A) the neural tube forms.

B) somites are created.

C) cells from the surface of the blastocyst migrate to form thegut.

D) three germ layers are established.

E) All of the above

  1. In humans, the secondary oocyte forms:
  1. at ovulation.
  2. during telophase I.
  3. after fertilization.
  4. at birth.
  5. all of the above.

  1. In Ascaris:
  1. The secondary oocyte is fertilized.
  2. Two polar bodies are visible when the secondary oocyte is inprophase II.
  3. Both a haploid and a diploid nucleus are present in a primaryoocyte during early prophase I.
  4. Cell plates are formed during both anaphase I and anaphaseII.
  5. No correct answer is given.
  1. A gastrula is:

a. an embryo that is younger than a blastula.

b. a stage in development that has three tissue layers.

c. a type of egg that has yolk concentrated at one end of thecell.

d. an opening in the center of an early embryo.

e. something else

  1. A human cell containing 22 autosomes and one Y chromosome isa

a. somatic cell of amale b. zygote

c. somatic cell of afemale d. a sperm e. an ovum

  1. The spermatogonium is ________ , and the primary spermatocyteis __________ .

a. diploid,haploid b. haploid, diploid

c. haploid,haploid d. diploid,diploid e. triploid, diploid

  1. The first cavity formed in the rapidly dividing starfish embryois the:

a. Blastoderm. b. Archenteron.

c. Neural groove. d. Blastocoel. e. Trophoblast.

Prior to coaxing a stem cell to become a heart muscle cell, Dr. P first replaced the stem cell’s nucleus with a nucleus from one of the patient’s skin cells. What was the purpose of this procedure?

a. The nucleus of the stem cell is haploid. The cell won’t divide unless the cell is made diploid through somatic cell nuclear transfer.
b. Since the stem cell now contains the genes of the patient, the heart tissue that is derived from the stem cell will be accepted by the patient’s body.
c. Dr. P wants to use a green fluorescent protein gene to follow the progress of the stem cells. Since human skin cells typically contain this gene, transferring the nucleus from a skin cell is an easy way to insert the required gene.
d. The heart is surrounded by an envelope of skin, and this cell will provide that skin once the other stem cells divide into heart tissue.
e. If the stem cells are pluripotent, then they won’t specialized unless they are given a nucleus from a fully specialized cell.

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