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What structure is most important in forming the tetrads? a. centromere b. synaptonemal complex c. chiasma d. kinetochore

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter12: Meiosis And Sexual Reproduction

Section: Chapter Questions

Problem 6SA: Dogs have a diploid chromosome number of 78. How many chromosomes do their gametes have? a. 39 c....

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Question

What structure is most important in forming the tetrads?
a. centromere
b. synaptonemal complex
c. chiasma
d. kinetochore

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How can duplications arise? A. by uneven crossing over during meiotic prophase B. by the loss of a telomere C. by chromosome breakage and exchange of arms D. by spindle failure during chromosome separation
Which process leads to independent assortment? a)The process of separating chromosomes b)The random alignment of homologs with respect to the others on the metaphase plate c)The process of forming the mitotic spindle d)The process of cytokinesis
When does DNA replication occur during meiosis? a. during telophase b. during prophase I c. during anaphase and telophase d. during interphase before meiosis I begins
a) In which stage of mitosis do chromosomes condense? (b) If a eukaryotic organism has a total of 34 chromosomes, how many pairs will the chromosomes be arranged in? (c) Define homologous chromosomes.
What is the main difference between autopolyploid and allopolyploid? a. the number of chromosomes b. the functionality of the chromosomes c. the source of the extra chromosomes d. the number of mutations in the extra chromosomes
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. fertilization
What are the number of chromosomes in fly?
Give explanation X and Y chromosomes are not homologs, but in meiosis they do pair and segregate in XY organisms to create 50% haploid gametes with an X chromosome and 50% haploid gametes with a Y chromosome. How is pairing achieved? a. Since all other homologous chromosomes pair, the remaining two chromosomes pair by default. b Pairing proteins are capable of binding to different genes on the X and Y chromosomes, which allows them to pair. c. None of the statements is correct. d. They don't actually pair. Random segregation generally ensures the X and Y chromosomes separate. e.Pseudoautosomal regions that are homologous exist at the tips of both the X and Y chromosomes, and they allow pairing.
Which set of daughter cells would result if the parent cell shown at left underwent mitosis? A) A B) B C) C D) D
The kinetochore is a structure that functions toa. connect the centromere to microtubules.b. connect centrioles to microtubules.c. aid in chromosome condensation.d. aid in chromosome cohesion.
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A) Hoe many cells are produced by the end of meiosis II? B) Are the cells produced at the end of meiosis II haploid or diploid? C) Are the chromosomes of the four final meiotic products replicated or nonreplicated?