BIOLOGY: CONCEPTS & INVESTIG W/CONNECT
3rd Edition
ISBN: 9781260239768
Author: Hoefnagels
Publisher: MCG CUSTOM
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Textbook Question
Chapter 10, Problem 14WIO
X inactivation explains the large color patches in calico cat fur and the smaller patches in tortoiseshell cat fur. In which type of cat do you expect X inactivation occurs earlier in development? Why?
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a) Do the loss of function phenotypes differ between the genes between the genes in figure 1? What does this mean?
b) What are the two cell types responsible for producing maternal gene products involved in terminal patterning in the Drosophila
cocyte? In which of these two cell types is each of the three genes expressed?
c) Based on the phenotypes you observed for the three genes, and on the differences in their expression patterns, which one of the
genes do you think is the localised determinant of terminal patterning?
d❘ From the gain-of-function experiments, do trunk and torso like work upstream or downstream of torso? Explain. (4 m
e) How might you test which of the trunk and torso-like genes acts upstream of the other?
f) The torso gene has been shown to have another important role in Drosophila development outside of terminal patterning. What do
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C
a…
explain Position-effect variegation in Drosophila?
Two hedgehog parents are heterozygous at the spiny locus, each with genotype Ss. This locus affects the length of the individuals’ spines, which ranges from 1 cm in SS homozygotes to 3 cm in ss homozygotes.Inheritance of spine length in this family is entirely due to the spiny locus and it exhibits additivity. Remember that development of spines depends on thousands of genes, but we’re only considering this one gene because it’s the one that varies in a way that affects spine length in this family.
a) List all of the phenotypes we could observe among offspring of these Ss heterozygote parents.
b) What’s the probability that an offspring of these heterozygous parents is an SS homozygote?
c) If the parents have exactly two offspring, what is the probability that the two hedgehog kids have no alleles in common? In other words, what’s the probability that one kid is SS and the other ss?
Chapter 10 Solutions
BIOLOGY: CONCEPTS & INVESTIG W/CONNECT
Ch. 10.1 - Describe the relationships among chromosomes, DNA,...Ch. 10.1 - Prob. 2MCCh. 10.2 - Why did Gregor Mendel choose pea plants as his...Ch. 10.2 - Distinguish between dominant and recessive;...Ch. 10.2 - Prob. 3MCCh. 10.3 - What is a monohybrid cross, and what are the...Ch. 10.3 - How are Punnett squares helpful in following...Ch. 10.3 - Prob. 3MCCh. 10.3 - How does the law of segregation reflect the events...Ch. 10.4 - Prob. 1MC
Ch. 10.4 - Prob. 2MCCh. 10.4 - How can the product rule be used to predict the...Ch. 10.5 - How do patterns of inheritance differ for unlinked...Ch. 10.5 - What is the difference between recombinant and...Ch. 10.5 - Prob. 3MCCh. 10.6 - Prob. 1MCCh. 10.6 - Differentiate between pleiotropy and epistasis.Ch. 10.6 - How can the same phenotype stem from many...Ch. 10.6 - 4. How can epistasis decrease the number of...Ch. 10.7 - Prob. 1MCCh. 10.7 - Prob. 2MCCh. 10.7 - Why do males and females express recessive...Ch. 10.7 - Prob. 4MCCh. 10.8 - How are pedigrees helpful in determining a...Ch. 10.8 - 2. How do the pedigrees differ for autosomal...Ch. 10.9 - Prob. 1MCCh. 10.9 - Prob. 2MCCh. 10.10 - Prob. 1MCCh. 10.10 - Prob. 2MCCh. 10 - In the list of four terms below, which term is the...Ch. 10 - According to Mendel, if an individual is...Ch. 10 - Prob. 3MCQCh. 10 - Each letter below represents an allele. Which of...Ch. 10 - Which of the following is a possible gamete for an...Ch. 10 - Use the product rule to determine the chance of...Ch. 10 - Refer to the linkage map in figure 10.16b. A...Ch. 10 - Prob. 8MCQCh. 10 - Prob. 9MCQCh. 10 - Prob. 10MCQCh. 10 - 1. What advantages do pea plants and fruit flies...Ch. 10 - Some people compare a homologous pair of...Ch. 10 - Prob. 3WIOCh. 10 - How did Mendel use evidence from monohybrid and...Ch. 10 - Prob. 5WIOCh. 10 - Prob. 6WIOCh. 10 - Prob. 7WIOCh. 10 - Prob. 8WIOCh. 10 - Prob. 9WIOCh. 10 - Prob. 10WIOCh. 10 - Prob. 11WIOCh. 10 - Prob. 12WIOCh. 10 - A family has an X-linked dominant form of...Ch. 10 - X inactivation explains the large color patches in...Ch. 10 - Prob. 15WIOCh. 10 - Prob. 16WIOCh. 10 - Prob. 17WIOCh. 10 - Design an experiment using twins to determine the...Ch. 10 - Prob. 1GPCh. 10 - In Mexican hairless dogs, a dominant allele...Ch. 10 - A species of ornamental fish comes in two colors;...Ch. 10 - Two lizards have green skin and large dewlaps...Ch. 10 - Prob. 5GPCh. 10 - Prob. 6GPCh. 10 - Prob. 7GPCh. 10 - Prob. 8GPCh. 10 - Prob. 9GPCh. 10 - Prob. 1PITCh. 10 - Explain the effects of a mutation, using allele,...Ch. 10 - 3. Add meiosis, gametes, incomplete dominance,...
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- Explain Maternal effect mutants affecting AP axis patterningarrow_forwardHuman females who are heterozygous for an X-linked recessive allele sometimes exhibit mild expression of the trait. However, such mild expression of X-linked traits in females who are heterozygous for Xlinked alleles is not seen in Drosophila. What might cause this difference in the expression of X-linked genes between human females and female Drosophila? (Hint: In Drosophila, dosage compensation is accomplished by doubling the activity of genes on the X chromosome of males.)arrow_forwardA number of genes that control expression of Hox genes in Drosophila have been identified. One of these homozygous mutants is extra sex combs, where some of the head and all of the thorax and abdominal segments develop as the last abdominal segment. In other words, all affected segments develop as posterior segments. What does this phenotype tell you about which set of Hox genes is controlled by the extra sex combs gene?arrow_forward
- In domesticated cats, the following are Independently assorting: 6. Normal ears (T) is dominant to tufted ears (t); Curved whiskers (C) is dominant to straight whiskers (c); The presence of six toes (S) is dominant to five toes (s); Gene for hair length is an X-linked codominant. The three phenotypes for hair length are long (XHXH), medium (X"X*), and short (X"Xh); medium is the heterozygous condition. Given two parents: TtccSSXHXh x TtCcSsXHY a) How many different gametes could be formed in the female cat with respect to these four traits? b) How many different phenotypes are possible in the offspring from this mating?arrow_forwardWhat would be the most likely effect on development of puncturing the posterior end of a Drosophila egg, allowing a small amount of cytoplasm to leak out, and then injecting that cytoplasm into the anterior end of another egg?arrow_forwardIn Drosophila sex determination (Check all that apply.) A) XY individuals transcribe the Sxl gene early but not late. B XX individuals carry the Sxl gene, XY individuals do not. XX individuals transcribe the Sxl gene, XY individuals do not. XX individuals express the Sxl protein, XY individuals do not. E) The Sxl transcript (Pre-MRNA) is spliced differently in XX compared to XY individuals.arrow_forward
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