WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
5th Edition
ISBN: 9781319487317
Author: PHELAN
Publisher: INTER MAC
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Chapter 9, 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.
Which of the following is a TRUE statement regarding the outcome of meiosis?
A.
In meiosis, one diploid cell (2n) can produce 2 haploid cells in males (1n).
B.
In meiosis, four haploid cells (1n) can produce 2 diploid cells (2n) in males.
C.
In meiosis, one diploid cell (2n) can produce up to 4 haploid cells (1n) in males.
D.
In meiosis, one diploid cell (2n) can produce 2 diploid cells (2n) in females.
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 9 Solutions
WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
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- 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 chromosomesarrow_forwardThe 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_forward
- Which 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_forwardA 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_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
- In 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_forwardHumans have 23 chromosomes per set. A person with 45 chromosomescan be described as beinga. euploid.b. aneuploid. c. monoploid.d. trisomic.arrow_forwardIn an organism with a haploid number of , how many possible combinations of maternal and paternal chromosomes can occur in its gametes? Select one: a. b. c. d.arrow_forward
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