CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
10th Edition
ISBN: 9780136538820
Author: Taylor
Publisher: INTER PEAR
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Chapter 27, Problem 12TYK
Summary Introduction
Introduction: The embryo is a prenatal form of humans but it is formed after the zygote that is formed just after the fusion of the male and the female gametes. Its next stage (zygote) is the formation of anembryo which is a multicellular form. From this stage there is the formation of the entire human organs.
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How does the production of sperm differ from the production of eggs? a. Sperm production involves meiosis, whereas egg production involves only mitosis. b. Meiosis during sperm production produces four sperm cells, whereas meiosis during egg production produces only one functional egg cell. c. Sperm are haploid, whereas eggs are diploid. d. Sperm production begins during fetal development, whereas the meiotic process that begins egg production doesn’t begin until puberty
Which of the following plays the greatest role in determining how cytoplasmic division occurs during cleavage?
a. Number of chromosomes
b. Amount of yolk
c. Orientation of the vegetal pole
d. Sex of the zygote
Is this true or false?
a. Fertilization is followed by a cleavage, a period of rapid cell division without growth.
b. From the process above, this results in the production of a large number of cells called blastomeres.
c. In sexual reproduction, the offspring have the same combinations of genes as their parents.
d. Sequential hermaphroditism occurs when an animal is one sex during one phase of its lifecycle and the opposite sex during another phase
Chapter 27 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
Ch. 27 - This graph plots the rise and fall of pituitary...Ch. 27 - Turns into the corpus luteum a. vas deferens b....Ch. 27 - a. vas deferens b. prostate gland c. endometrium...Ch. 27 - Prob. 4TYKCh. 27 - Prob. 5TYKCh. 27 - Site of human gestation a. vas deferens b....Ch. 27 - Prob. 7TYKCh. 27 - Secretes seminal fluid a. vas deferens b. prostate...Ch. 27 - Prob. 9TYKCh. 27 - After a sperm penetrates an egg, it is important...
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- Which cell contributes the necessary nutrition to the growing zygote? a a polar body b the egg cell c a spermatocyte d the sperm cellarrow_forwardHow many functional eggs (ova) result from one oogonium? A. 1 and 3 polar bodies B. 18 C. 4 D. 16arrow_forwardWhich germ layer is involved in the process of neurulation? Select one: a. Mesoderm b. Endoderm c. Embryonic disk d. Ectodermarrow_forward
- Which mechanism prevents an ovum from being fertilized by multiple sperm cells? A. Once a sperm penetrates the jelly-like coating of the egg, no other sperm cell can penetrate the coating. B. When a sperm fuses with the plasma membrane of the egg, depolarization of the membrane occurs. C. The egg can survive in the Fallopian tube for 24 hours s it does not have mitochondria to produce energy. D. When more than a single sperm cell fuses with the plasma membrane, multiple zygotes can form, leading to the twin or triplets.arrow_forwardThe process forming the neural tube and plate via the intercalation of cells along the medial-lateral axis and extension along the anterior-posterior axis occurs is called? a. neurulation b. embryogenesis c. convergent extension d. morphogenesisarrow_forwardAt which stage of embryonic development does the embryo have a blastopore? Group of answer choices A.Blastula B. Zygote C. Morula D. Gastrulaarrow_forward
- If meiosis produce haploid cells, how is the diploid numberrestored for those organisms that spend most of their life cycle in the diploid state? a. DNA replication b. reverse transcription c. synapsis d. fertilizationarrow_forwardThe process by which the structure labeled B is released from the structure labeled A is known as? A. differentiation B. ovulation C. gastrulation D. germinationarrow_forwardRefer to the diagram of gametogenesis to answer item 23 - 25 23. Which of the structure contains haploid (n) number of chromosomes? A. 1 B. 5 C. 6 D. 4 24. Which of the structures contains diploid (2n) number of chromosomes? A. 1 and 2 B. 3 and 4 C. 6 and 8 D. 7 and 925. What is the ratio of spermatids and ootid produced in Gametogenesis? A. 4 spermatids : 4 ootids B. 4 spermatids : 2 ootids C. 1 spermatid : 4 ootids D. 4 spermatids : 1 ootidarrow_forward
- Which statement best describes the genetic content of the two daughter cells in prophase II of meiosis? a. haploid with one copy of each gene b. haploid with two copies of each gene c. diploid with two copies of each gene d. diploid with four copies of each genearrow_forwardThe parts of an ovule include the following structures. Indicate whether each is haploid or diploid. a. Archegonium b. Egg c. Female gametophyte d. Integument e. Nucellus f. Ovuliferous scalearrow_forwardAt which point during meiosis do haploid cells first appear? A. metaphase I B. anaphase I C. metaphase II D. anaphase IIarrow_forward
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