BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 11, Problem 6A
Summary Introduction
Introduction:
Crossing over occur at the time of chiasmata formation. Chiasmata is a point that is present in the homologous chromosomes that get exchanged between two strands. Although DNA repair is a mechanism that involve a protein causes the addition of
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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.
Which of the following statements regarding the Y chromosome in mammals is TRUE?A. The Y chromosome is less than half the size of the X chromosome.B.Y chromosomes are most often present in egg cells and are not found in sperm cells.
C.Most female mammals have one Y chromosome.
D. The Y chromosome contains no protein-coding genes.
In an organism’s genome, autosomes are
a. the chromosomes that differ between the sexes.
b. chromosomes that are involved in sex determination.
c. only inherited from the mother (maternal inheritance).
d. all of the chromosomes other than sex chromosomes
Chapter 11 Solutions
BIOLOGY
Ch. 11.1 - Prob. 1LOCh. 11.1 - Prob. 2LOCh. 11.2 - Describe how homologous chromosomes pair during...Ch. 11.2 - Prob. 2LOCh. 11.3 - Prob. 1LOCh. 11.3 - Prob. 2LOCh. 11.3 - Prob. 3LOCh. 11.4 - Prob. 1LOCh. 11.4 - Prob. 2LOCh. 11.4 - Explain the importance of the suppression of...
Ch. 11 - Prob. 1IQCh. 11 - In comparing somatic cells and gametes, somatic...Ch. 11 - What are homologous chromosomes? a. The two halves...Ch. 11 - Chiasmata form a. between homologous chromosomes....Ch. 11 - Crossing over involves each of the following with...Ch. 11 - During anaphase I a. sister chromatids separate...Ch. 11 - At metaphase I the kinetochores of sister...Ch. 11 - What occurs during anaphase of meiosis II? a. The...Ch. 11 - Which of the following does NOT contribute to...Ch. 11 - How does DNA replication differ between mitosis...Ch. 11 - Which of the following is NOT a distinct feature...Ch. 11 - Which phase of meiosis I is most similar to the...Ch. 11 - Structurally, meiotic cohesins have different...Ch. 11 - Prob. 6ACh. 11 - Diagram the process of meiosis for an imaginary...Ch. 11 - Mules are the offspring of the mating of a horse...Ch. 11 - Compare the processes of independent assortment...Ch. 11 - Aneuploid gametes are cells that contain the wrong...
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- the kinetochore of a metaphase chromosome is a. The ends of the chromosome that are duplicated by telomerase. b. The repeated DNA sequence at the centromere that is composed of cohesion protein. c. A protein complex that assembles on the outer surface of the chromosome to mediate attachment to the kinetochore microtubules d. The protein complext that contains cohesion and mediates attachment of the sister chromatids.arrow_forwardWhen does chromosomal nuclear DNA, which is found inside the nucleus of a eukaryotic cell, replicate? A. All types of eukaryotic cell in a human organism replicates throughout their life span. B. It only replicates during the S phase (synthesis phase) of the cell cycle. C. The chromosomal DNA only replicates once throughout their lifetime. D. It replicates during the G1 and G2 phases of the M(mitosis) phase of Meiosis.arrow_forwardWhat is the function of the kinetochore during mitosis?a. It promotes the attachment of monads to each other toform a dyad.b. It is a location where a kinetochore microtubule can attachto a chromosome.c. It promotes the condensation of chromosomes duringprophase.d. Both a and b are correct.arrow_forward
- 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.arrow_forwardWhat 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 chromosomesarrow_forwardWhat is a main difference between onion root tip (plant cell) mitosis and whitefish blastula (animal cell) mitosis? A. The DNA is animal cells is inside of a nucleus but there is no nucleus in plant cells. B. A cleavage furrow is not formed in plant cells due to the rigid cell wall. C. Plant cells do not have DNA and animal cells do. D. Plant cells have undergo prophase where they condense their chromosomes but animal cells skip this step.arrow_forward
- Humans with aneuploidy who survive usually have incorrect numbersof chromosome 13, 18, or 21 or the sex chromosomes. A possibleexplanation why these abnormalities permit survival is becausea. the chromosomes have clusters of genes that aid in embryonicgrowth.b. the chromosomes are small and carry relatively few genes.c. of X-chromosome inactivation.d. of both b and c.arrow_forwardWhich is NOT a way that deletions can cause abnormal phenotypes? A. Haploinsufficient genes can result because too much gene product is produced. B. Recessive mutations may be expressed if the wild-type allele is deleted, a phenomenon called pseudodominance. C. If the centromere is deleted, then the whole chromosome could be lost during cell division. D. All of the above 1 pointsarrow_forwardWhich of the following is the main reason why DNA must exist in chromosome form? a.)To favor the formation of sister chromatids b.)To allow the protein histones to carry out its task c.)To avoid the genetic material to be tangled away during cell division d.)To promote the formation of spindle fibersarrow_forward
- Loss of cell cycle control may lead to (a) pregnancy. (b) cancer. (c) fertilization. (d) crossing-over of homologous chromosomes.arrow_forwardHumans produce skin cells by mitosis and gametes by meiosis. Which of the following statements about the nuclei of skin cells is correct? a. They contain half as much DNA as the nuclei of gametes produced by meiosis. b. They contain four times as much DNA as the nuclei of gametes produced by meiosis. c. They contain the same amount of DNA as the nuclei of gametes produced by meiosis. d. They contain twice as much DNA as the nuclei of gametes produced by meiosis.arrow_forwardAccording to the Lyon hypothesis,a. one of the X chromosomes is converted to a Barr body insomatic cells of female mammals.b. one of the X chromosomes is converted to a Barr body in allcells of female mammals.c. both of the X chromosomes are converted to Barr bodies insomatic cells of female mammals.d. both of the X chromosomes are converted to Barr bodies inall cells of female mammals.arrow_forward
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