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 4MC
Summary Introduction
Introduction:
Mendel proposed three laws that form the base of studies on inheritance.
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3) A. How are the following proteins involved in cell division: condensing, cohesin,
kinetochore complex, tubulin?
B. Why does phenotype not always reveal genotype?
C. How can Mendel's postulates of segregation and independent assortment be explained
by meiosis?
D. Explain the genotypic and phenotypic ratios predicted when performing a monohybrid
and a dihybrid cross of heterozygotes?
E. How can you use the product rule and sum rule to calculate the probability of a
particular genotype resulting from crossing parents of specific genotypes?
Which of the following is false, regarding the law of segregation?
A.
It states that each of two alleles for a given trait segregate into different gametes.
B.
It can be explained by the segregation of sister chromatids during mitosis.
C.
It can account for the 3:1 ratio seen in the F2 generation of Mendel's crosses.
D.
It can be used to predict the likelihood of transmission of certain genetic diseases within families.
Crossing over means the same as:
a.
incomplete dominance
b.
the process by which pieces of homologous chromosomes are exchanged
c.
heterozygosity
d.
the peculiar lineup of homologous chromosomes
e.
independent assortment
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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- 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.arrow_forwardWhich of the following statements accurately represents the difference between a gene and a locus? a. A gene is dominant, and a locus is recessive. b. A locus and a gene are essentially the same - there is no difference. c. A locus occurs in diploid cells, and a gene occurs in a haploid cell. d. A locus is a phenotype and a gene is a genotype.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
- Which of the following is an explanation for independent assortment of alleles on different chromosomes (Mendel's second law)? A. Chromosomes can have different functions in various types of cells of the same organism. B. In metaphase I, alignment of 1 pair of replicated chromosomes does not affect the alignment of another pair. C. Each chromosome is capable of a different function. D. In prophase I, which chromosomes pairs with which other one is completely random. E. Chromosomes are divided into daughter cells in a random fashion.arrow_forwardIn diseases with a recessive inheritance linked to sex (X chromosome), from the mother: A. 50% of women and 50% of men are affected. B. The woman is always affected by the disease. C. The man is always affected by the disease. D. 50% of women are affected.arrow_forwardWhat can you assert regarding cytoplasmic inherited traits? A. extensive phenotypic variation exhibited, even within a single family B. reciprocal crosses that give different results C. All of the answers are correct. D. usually inherited from one parent, typically the maternal parent E. present in both males and femalesarrow_forward
- Under what conditions does one expect a 9:3:3:1 ratio? What may cause this ratio to vary? A. dihybrid cross with independent assortment; epistasis B trihybrid cross with linked chromosomes; Down syndrome C dihybrid cross with linked chromosomes; the 9:3:3:1 ratio will remain unchanged regardless of other conditions D. dihybrid cross with independent assortment; Turner syndrome E. monohybrid cross with independent assortment; epistasisarrow_forwardWhich of the following statements about genes is TRUE? a. Alleles of genes located on the same chromosome may assort independently. b. Alleles of genes on the same chromosome always fail to assort independently. c. Linked genes are located on the same chromosome. d. a and c, but not b e. b and c, but not aarrow_forwardWhich of the following terms may be used to describe a disease thathas multiple phenotypes?a. multifactorial d. sex-linkedb. codominance e. pleiotropyc. incomplete dominancearrow_forward
- Choose the statement that is incorrect.a. A son can inherit a recessive allele on anX chromosome from either parent.b. An individual may inherit three or more of eachtype of chromosome characteristic of the species, acondition called polyploidy.c. A female child inherits one X chromosome from hermother and one from her father.d. Pedigree analysis can be used to determine a futurechild’s chance of being born with achondroplasiaarrow_forwardWhich of the following is true of recessive sex-linked genes? A. A female showing the trait will pass it on to all of her sons who will all show the trait. B. A female showing the trait will pass it on to all of her daughters who will all show the trait. C. A male showing the trait will pass it on to all of his sons who will all show the trait. D. A male showing the trait will pass it on to all of his daughters who will all show the trait.arrow_forwardWhich of the following statements correctly describes the Law of Independent Assortment? a. A large Punnett square can be used to predict the outcome of a parental cross involving two traits. b. Non-allelic genes do not affect each other if they are located on separate chromosomes. c. Sometimes all alleles lack dominance, which leads to a blending of traits. d. The dominant allele is represented with an uppercase letter and the recessive allele is represented with a lowercase letter.arrow_forward
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