Biological Science, Books a la Carte Plus Mastering Biology with Pearson eText -- Access Card Package (6th Edition)
6th Edition
ISBN: 9780134296029
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 14, Problem 3TYK
Summary Introduction
Introduction:
Alleles are the alternative forms of a gene. A dominant allele, whenever present, expresses its phenotypic character. However, a recessive allele needs to be present in a pair, in order to express the
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How do we know that X chromosomal inactivation of either the paternal or maternal homolog is a random event during early development in mammalian females? Select all that apply.
a. Studying the electrophoretic variants of glucose-6-phosphate dehydrogenase.
b. Using test crosses involving females possessing different genetic markers in sex chromosomes.
c. Cytological studying during the blastocyst stage of development.
d. Observing the mosaic coat patterns inheritance.
e. Using electronic microscopy to track the inactivation of X chromosome.
Molecular geneticists have performed experiments in which they altered the number of copies of the bicoid gene in flies, affecting the amount of Bicoid protein produced. a. What would be the effect on development of an increased number of copies of the bicoid gene? b. What would be the effect of a decreased number of copies of bicoid? Justify your answers.
In mammals, males have X and Y sex chromosomes, while females have two Xs. While the Y sex chromosome has very few genes associated with it, the X sex chromosome has many that are important to maintain life. How do mammals account for this in terms of equaling out gene expression levels?
A. Mammals do not need to account for this, but birds do.
B. Females produce more proteins from X-linked genes than males do.
C. The single X of the males works twice as hard to keep up with the female’s two Xs.
D. The females have one X inactivated to permit the males to keep pace with them.
Chapter 14 Solutions
Biological Science, Books a la Carte Plus Mastering Biology with Pearson eText -- Access Card Package (6th Edition)
Ch. 14 - 1. The genes for the trails that Mendel worked...Ch. 14 - 2. CAUTION Why is the pea wrinkled-seed allele a...Ch. 14 - Prob. 3TYKCh. 14 - 4. Mendel’s rules do not correctly predict...Ch. 14 - Prob. 5TYKCh. 14 - Prob. 6TYKCh. 14 - Example Problem Two black female mice are crossed...Ch. 14 - Prob. 8TYKCh. 14 - Prob. 9TYPSSCh. 14 - Prob. 10TYPSS
Ch. 14 - 11. In garden peas, yellow seeds (Y) are dominant...Ch. 14 - Prob. 12TYPSSCh. 14 - The smooth feathers on the back of the neck in...Ch. 14 - SOCIETY As a genetic counselor, you advise couples...Ch. 14 - 15. Suppose you are heterozygous for two genes...Ch. 14 - Suppose a woman with blood type O married a man...Ch. 14 - Prob. 17TYPSSCh. 14 - Society Two mothers give birth to sons at the same...Ch. 14 - Prob. 19TYPSSCh. 14 - QUANTITATIVE Recall that hemophilia is an X-linked...Ch. 14 - Prob. 21PIATCh. 14 - Given the pedigree, what is the most likely mode...Ch. 14 - Prob. 23PIATCh. 14 - QUANTITATIVE If the son with ALD in the third...Ch. 14 - Prob. 25PIATCh. 14 - Prob. 26PIAT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- . A woman with Turner syndrome is found to be colorblind (an X-linked recessive phenotype). Both her motherand her father have normal vision.a. Explain the simultaneous origin of Turner syndromeand color blindness by the abnormal behavior ofchromosomes at meiosis.b. Can your explanation distinguish whether theabnormal chromosome behavior occurred in the fatheror the mother?c. Can your explanation distinguish whether theabnormal chromosome behavior occurred at the first orsecond division of meiosis?d. Now assume that a color-blind Klinefelter man hasparents with normal vision, and answer parts a, b, and c.arrow_forward1. A What would be the genotype(s) and phenotype(s) of the offspring when a heterozygous corn plant is bred with a homozygous plant with purple kernels? Show your work in a Punnett square and explain why you would get the proposed offspring (demonstrate your understanding of inheritance in terms of genotype and phenotype). 1. B What would be the genotype(s) and phenotype(s) of the offspring when a heterozygous corn plant is bred with another heterozygous corn plant? Show your "reasoning" with a Punnett square.arrow_forwardpls draw the punnett squarearrow_forward
- a. What is the type of inheritance? b. What is known of the genotype of the male in the above cross? c. What is known of the genotype of the female in the above cross? d. Provide map distances if possible.arrow_forwardhelparrow_forwardPlease answer fast Using the image above: A. How many different gametic genotypes can each horse form with these five loci? B. For the horse that can form the largest number of unique gametic genotypes (INCLUDE THE ONE YOU IDENTIFY IN YOUR ANSWER), Which of those gametic genotypes is most likely? Please Explain. C. How many gametes from Horse #1 (Labeled with genotype "I" in the image) will transmit the HRD and CA alleles together?arrow_forward
- 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?arrow_forwardData set A summarizes F2 numbers from an F1 cross arising from two, true-breeding Drosophila strains (P generation), which differ with respect to two mutant traits. The traits of legs shows an autosomal incomplete dominance pattern and the traits for wings shows an X-linked regular dominance pattern. a) Produce a genetic hypothesis about the mode of inheritance of each of the alleles from your data set. You must come up with a hypothesis that both makes sense and will not be rejected, in other words, you need a hypothesis that will corroborate the experimental observations. b) Explain/describe how the data set seems to support your genetic hypothesis for each trait. For example, explain why you think a trait is recessive vs dominant or X-linked vs autosomal. To do this, you could comment on the observed ratios and/or differences or similarities in male and female numbers and explain how these provide support for your hypotheses. c) Assign genetic symbols to the four alleles involved.…arrow_forwardIn Drosophila melanogaster white (w) and miniature (m) wings are controlled by X-linked recessive genes with a recombination fruequency between them of approximately 38%. Show the sexes, phenotypes and proportions of offspring expected from the following mating:a. ++/wm female X wm maleb. +m/w+ female X w+ malec. w+/+m female X ++ maleIf we assume that white eyes and miniature wings are not x-linked but are linkedto the autosomal genes, what phenotypic frequencies would you expect from this cross: ++/wm female X ++/wm male?arrow_forward
- Please answer all parts.arrow_forwardDeranged: is a phenotype in Drosophila in which the thoracic bristles are disarranged and the wings held vertically upward. Crosses between deranged females and normal males, each from pure stock cultures, result in a 1:1 ratio of normal females to deranged males among the progeny. What does this show? A. The gene for deranged is autosomal and dominant. B. The gene for deranged is autosomal and recessive. C. The gene for deranged is X-linked and dominant. D. The gene for deranged is X-linked and recessive. E. Deranged is determined by two genes interacting epistatically.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_forward
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