WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 7, Problem 1MC
Summary Introduction
Introduction:
Genes usually have more than one form, with each form coding for a different
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What gametes are produced by the following organisms:
a. Genotype YyRr, if Y and R are on different chromosomes
b. Genotype YyRr, if dominant Y and R are on the same chromosome, no crossing over
c. Genotype YyRr, if dominant Y and recessive r are on the same chromosome, no crossing over
d. Genotype YyRr, if dominant Y and R are on the same chromosome, 50% crossing over
e. What is the genotype of the F1 generation if parents RRyy and rrYY are crossed, R and y are located on the same chromosome, no crossing over.
What two processes are responsible for generating genetic diversity in gametes?
Select one or more:
a. Independent assortment of homologous chromosomes
b. Separation of sister chromatids
c. Recombination (“crossing over”) of sister chromatids
d. Recombination (“crossing over”) of homologous chromosomes
At the end of meiosis in humans, four gametes are produced that are:
A.
Genetically identical to each other and to the parent cell
B.
Genetically identical to each other but genetically different from the parent cell
C.
Genetically different from each other and the parent cell
D.
Genetically identical to the parent cell from different from each other
Chapter 7 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
Ch. 7 - Prob. 1SACh. 7 - Prob. 2SACh. 7 - Prob. 3SACh. 7 - Prob. 4SACh. 7 - Prob. 5SACh. 7 - Prob. 6SACh. 7 - Prob. 7SACh. 7 - Prob. 8SACh. 7 - Prob. 9SACh. 7 - Prob. 10SA
Ch. 7 - Prob. 11SACh. 7 - Prob. 12SACh. 7 - Prob. 13SACh. 7 - Prob. 14SACh. 7 - Prob. 15SACh. 7 - Prob. 1MCCh. 7 - Prob. 2MCCh. 7 - Prob. 3MCCh. 7 - Prob. 4MCCh. 7 - Prob. 5MCCh. 7 - Prob. 6MCCh. 7 - Prob. 7MCCh. 7 - Prob. 8MCCh. 7 - Prob. 9MCCh. 7 - Prob. 10MCCh. 7 - Prob. 11MCCh. 7 - Prob. 12MCCh. 7 - Prob. 13MCCh. 7 - Prob. 14MCCh. 7 - Prob. 15MCCh. 7 - Prob. 16MC
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- The term endopolyploidy refers to the phenomenon of havinga. too many chromosomes.b. extra chromosomes inside the cell nucleus.c. certain cells of the body with extra sets of chromosomes.d. extra sets of chromosomes in gametes.arrow_forwardThe diploid number of an organism is 12. How many chromosomes would be expected from the following conditions? a. monosomic for 1 chromosome b. trisomic for 2 chromosomes c. tetrasomic for 1 chromosome d. nullosomic for 2 chromosomes e. monoploid f. triploidarrow_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_forward
- A diploid individual with two identical alleles for a particular gene is said to be: a. homozygous for that gene b. heterozygous for that gene c. pleiotropic for that gene d. autosomal for that gene e. codominant for that genearrow_forwardWhich of the following statements are true regarding homologous pairs of chromosomes? Select all that apply. A. They are the same size B. Their prescence indicates a cell is a diploid C. They are identical copies of one another D. One of the homologous chromosomes in a set is synthesized during S phase E. They line up next to each other during metaphase I of meiosis F. They are separated in anaphase I of meiosisarrow_forwardDuring the observation of a baby the diagnosis of Down's syndrome was made. What is the main cause of this pathology? Select one: a. Trisomy on the 13-th chromosome. b. Trisomy on the 21-st chromosome. c. Trisomy on X chromosome. d. Monosomy on the 1-st chromosome. O e. Undivergence of sex chromosomes.arrow_forward
- Which of the following best describes Klinefelter syndrome? A. It is an example of aneuploidy. B. Affected individuals are males with low fertility. C. Only one X chromosome is active in these individuals. D. All of the above.arrow_forwardA phenotype reflecting a new combination of genes occurring during gamete formation is called Select one: O a. homozygous. O b. a recombinant type. O c. a multihybrid cross. O d. an independent assortment. O e. heterozygous.arrow_forwardProduction of more than one phenotypictrait by a single gene is calleda. pleiotropy.b. genetic determinism.c. codominance.d. penetrance.e. genetic recombination.arrow_forward
- An individual can have an abnormal number of chromosomes as a result of nondisjunction. Identify the following example of nondisjunction that results in an abnormal number of chromosomes. A. Sister chromatids do not separate in meiosis II. B. Homologous chromosomes move apart appropriately during meiosis I. C. Mitosis occurs normally during embryonic development. D. Two normal gametes fuse during fertilization.arrow_forwardHumans have 23 chromosomes per set. A person with 45 chromosomescan be described as beinga. euploid.b. aneuploid. c. monoploid.d. trisomic.arrow_forwardIn 95% of cases of Down's syndrome, there is an entire extra chromosome 21 in every cell. This aneuploid condition is the result of A. Improper crossing over. B. Independent assortment. C. Nondisjunction. D. All are correct.arrow_forward
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