Bundle: Human Biology, Loose-leaf Version, 11th + MindTap Biology, 1 term (6 months) Printed Access Card
11th Edition
ISBN: 9781305616660
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 19, Problem 7SQ
Which statement best fits the principle of segregation?
- a. Units of heredity are transmitted to offspring.
- b. Two genes of a pair separate from each other during meiosis.
- c. Members of a population become segregated.
- d. A segregating pair of genes is sorted out into gametes independently of how gene pairs located on other chromosomes are sorted out.
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How can the order of three linked genes (A, B, and C) on the same chromosome be determined?
A.
Calculating the frequency of recombination between genes.
B.
Gene order cannot be determined by looking at the results of a cross.
C.
Look for parental phenotypes.
D.
Look for single-crossover phenotypes involving the wild-type and mutant alleles of genes A, B, and C.
Which statement about homologous chromosomes is FALSE?
Select one:
a. They contain the same genes in the same places along the length of the chromosome
b. One member of the homologous pair came from your mother, the other from your father
c. For a particular gene, one member of the pair may have one allele, while the other has a different allele
d. They are joined together at the centromere as the two halves of the typical X-shaped chromosome
What is necessary for a chromosome bridge to occur?
a. centromeres are necessary
b. chromosome bridges only apply to meiosis
c. centromeres and fusion
d. fusion is necessary
e. applies only to mitosis and involves fusion and centromeres
Chapter 19 Solutions
Bundle: Human Biology, Loose-leaf Version, 11th + MindTap Biology, 1 term (6 months) Printed Access Card
Ch. 19 - Define the difference between (a) gene and allele,...Ch. 19 - Prob. 2RQCh. 19 - What is probability, and how is it applied in...Ch. 19 - What is independent assortment? Does independent...Ch. 19 - Alleles are ___________. a. alternate forms of a...Ch. 19 - A heterozygote has _____. a. only one of the...Ch. 19 - Prob. 3SQCh. 19 - Offspring of a cross AA aa are ______. a. all AA...Ch. 19 - Prob. 5SQCh. 19 - Prob. 6SQ
Ch. 19 - Which statement best fits the principle of...Ch. 19 - Prob. 8SQCh. 19 - Prob. 9SQCh. 19 - Prob. 10SQCh. 19 - One gene has alleles A and a. Another has alleles...Ch. 19 - Still referring to Problem 1, what will be the...Ch. 19 - Go back to Problem 1, and assume you now study a...Ch. 19 - The young woman shown at right has albinismvery...Ch. 19 - When you decide to breed your Labrador retriever...Ch. 19 - The ABO blood system has been used to settle cases...Ch. 19 - Prob. 7CTCh. 19 - A man is homozygous dominant for ten different...Ch. 19 - Prob. 9CTCh. 19 - Bill and Marie each have flat feet, long...Ch. 19 - You decide to breed a pair of guinea pigs, one...
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- You have a cell with 4 homologous pairs of chromosomes. Assuming no crossing over, how many combinations of chromosomes are possible in cells after meiosis is completed. Group of answer choices A. 4 B. 16 C. 32 D. 8arrow_forwardWhich observation led Thomas Morgan to realize that the gene for fruit fly eye color was located on a sex chromosome? a. He noticed that only male F2 flies could have white eyes; no females displayed this trait. b. He saw that the F2 generation of flies had the classic 3:1 phenotypic ratio of red eyes to white eyes c. He read it in a biology textbook d. He noticed that only mutant flies had white eyesarrow_forwardIf a muscle cell in a frog has 28 chromosomes how many chromosomes will an unfertilized egg produced by this same frog have? Group of answer choices a. 7 b. 28 c. 35 d. 14 e. 56arrow_forward
- A research scientist is studying diseases associated with homologous chromosomes and notices that the same gene along the chromosome has different function what can you conclude about his findings? A. The homologous pairs have been recombined and therefore he is studying end joining of chromosomes B. He is studying sex chromosomes and the differences are because the chromosomes are from a male species organism C. He has identified different alleles among homologous chromosomes. D. He is studying basic chromosome remodeling during fertilzationarrow_forwardThe mating below shows the sex chromosome found in two parents and their resulting offspring. Use this family information to answer the following questions. Xfmr1 Y x Xfmr1 XFMR1 → XFMR1 XFMR1Y How many Barr bodies would the child have? a. 3 b. 2 c. 1 d. 0 e. Cannot be determinedarrow_forwardAny deviation in the number of chromosomes that involves individual chromosomes, as opposed to entire sets of chromosomes, is known as which one of the following?a. Aneuploidy c. Duplication b. Disomy d. Translocationarrow_forward
- 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 separationarrow_forwardAn organism that has two different alleles for a single trait is said to be for that trait. Select one: O O O a. heterologous b. heterozygous c. homozygous d. haploid e. diploidarrow_forwardThe diagram above depicts Select one: a. nondisjunction b. complete dominance c. crossing over d. the law of segregationarrow_forward
- 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.arrow_forwardWhat structure is most important in forming the tetrads? a. centromere b. synaptonemal complex c. chiasma d. kinetochorearrow_forwardHow many chromosomes can a gamete possess as a result of nondisjunction? A. 2n+1 or n-1B. 2n+1 or 2n-1C. n+1 or n-1D. 2n - 1 onlyarrow_forward
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