Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 13, Problem 10SQ
True or false? All traits are inherited in a Mendelian pattern.
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Classical Mendelian Genetics, Incomplete Dominance, Codominance, and Multiple Alleles
1. Complete the table given below regarding the phenotype and genotype ratios in completely
dominant traits. R and r represent the dominant and recessive allele, respectively.
Type of Cross
rrx rr
RR x rr
Rrx rr
Rrx Rr
Genotype Ratio
Phenotype Ratio
RR x Rr
RR X RR
*How would the genotype ratios be affected if the mode o inheritance in incomplete dominance?
Codominance?
2. In dogs, barer trait is controlled by a dominant gene D and the silent trait by the recessive gene d.
Normal tail is dependent on a dominant gene M and the screw m. Give the probable genotypes of
the parents in the following crosses:
Phenotype of parents
Phenotypes of progeny
Genotypes of parents
Barker
Barker Silent
Silent
normal
screw
normal
normal
a. silent normal x silent normal
b. barker normal x silent normal
0
0
6
2
7
2
8
3
c. barker normal x silent screw
4
5
5
3
d. barker screw x silent normal
6
0
0
0
e. barker screw x…
Chapter 13 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 13 - Prob. 1DAACh. 13 - Prob. 2DAACh. 13 - Prob. 3DAACh. 13 - Prob. 1SQCh. 13 - An organisms observable traits constitute its...Ch. 13 - Prob. 3SQCh. 13 - Prob. 4SQCh. 13 - The offspring of the cross AA aa are ________. a....Ch. 13 - Refer to question 5. Assuming complete dominance,...Ch. 13 - A testcross is a way to determine ________. a....
Ch. 13 - Assuming complete dominance, a cross between...Ch. 13 - The probability of a crossover occurring between...Ch. 13 - True or false? All traits are inherited in a...Ch. 13 - One gene that affects three traits is an example...Ch. 13 - The phenotype of individuals heterozygous for...Ch. 13 - _______ in a trait is indicated by a bell curve....Ch. 13 - Match the terms with the best description. ______...Ch. 13 - Mendel crossed a true-breeding pea plant with...Ch. 13 - Assuming that independent assortment occurs during...Ch. 13 - Refer to problem 2. Determine the predicted...Ch. 13 - For each genotype listed, what allele combinations...Ch. 13 - Prob. 5GPCh. 13 - Suppose you identify a new gene in mice. One of...Ch. 13 - Mutations in the TYR gene may render its enzyme...Ch. 13 - In sweet pea plants, an allele for purple flowers....Ch. 13 - Red-flowering snapdragons are homozygous for...
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- Neo-Mendelian Genetics: Complete dominance and overdominance Huntington’s disease, a neurodegenerative genetic disorder that typically becomes noticeable in middle age, is due to an autosomal dominant allele. Sickle cell anemia, on the other hand, is a genetic blood disorder due to a recessive allele. Mary is a carrier of the allele for sickle cell anemia but has no sign of any neurodegenerative disorder in her family. She married Paul whose father died of Huntington’s disease. His mother, however, is not inflicted with that condition. Neither of his parents exhibits sickle cell anemia. What are the genotypes of Mary and Paul? If they plan to have four children, what is the probability that: all their children will be normal? ____________ they will have a son with Huntington’s disease? ___________ they will have a daughter inflicted with both conditions?____________arrow_forwardI need explanation for the why the answer is correct? And why would the other options wrongarrow_forwardCystic fibrosis is an autosomal disease that mainly affects the white population, and 1 in 20 whites are heterozygotes. Genetic testing can diagnose heterozygotes. Should a genetic screening program for cystic fibrosis be instituted? Should the federal government fund it? Should the program be voluntary or mandatory, and why?arrow_forward
- Mendel's P1 Dihybrid Cross First parental (P1) generation WWGG wWgg Gametes WG Wg First filial (F1) generation Genotype Phenotype g bns es WwGg round and yellow- seeded plants Figure 1.3 Activity 4. SELF-CHECK 1. Based on the reșults of the dihybrid cross, can you tell which traits are dominant? Recessive? The P1 dihybrid cross is illustrated in Figure 1.3. Study it carefully. Capital letter W represents round pea seed which is dominant over wrinkled pea seed (w). Second parental (P2) generation (F1 self-pollinated) Ww Gg WwGg WG riWg WG of WG Gametes wG wG wg wg Second filial (F1) generation WG Wg wG to vitnsb Male wg Female WwGg 4 8 WWGg 2 wwgg 6 WwGg 10 14 WG WWGG 1 WWGG 3 Wg wG wWGg 5 WwGg 9 WwGg 13 WwGg 7 wwGg 11 wwGg 15 Wwgg wwGg 12 16 Wg Wwgg wwgg 2WwGg 4WwGg 2Wwgg Genotypic ratio 1 WWGG 2 WWG9 1WWgg 1wwGG 2wwGg 1wwggarrow_forwardThey are all 1/16 instead of 1/8?? Why is thatarrow_forwardAnswer the following question from the photo:arrow_forward
- This question will test your Mendelian genetics knowledge! On a piece of paper, construct TWO Punnett squares (set up both of your Punnett squares like the example square provided below). In this classic Mendelian genetics cross, you will start with a female cat from a PURE BREEDING brown furred population. You mate this female with a male cat selected from a PURE BREEDING yellow furred population. BROWN fur is the dominant allele. In your first Punnett square, show the P generation cross, with the F1 generation results. Be sure to label this as your P generation cross! Use the correct genotype symbols, as used in standard dominant / recessive allele systems, to show all genotypes. In your second Punnett square, do a monohybrid cross of the F1 generation, to show the expected F2 generation results. Be sure to use the correct genotype symbols. Next to BOTH of your Punnett Squares, write out the expected genotype and phenotype ratios for the offspring generations. Use the TERMS used to…arrow_forwardHahshshhzhzharrow_forwardCan anyone explain the answer？draw the punnett square and step by step explaination please.arrow_forward
- parents. Gregor Mendel was the first person who applied the genetic techniques. Question 2 Which option is not one of the observations of Mendel's experiment? O The ratio of the dominant and recessive traits in F2 is 3:1. Both parental phenotypes observed in F1 generation. O The pattern of inheritance was the same for all seven tested traits. O The sex of the parents does not affect the inheritance of a trait in garden peas.arrow_forwardList four modified Mendelian ratios that you can think of.arrow_forwardThe picture shown here is pedigree chart for a family, some of whose members exhibit the dominant trait, a widow's peak. Individuals with a widow's peak are indicated by a filled square or circle. Individuals with a straight hairline are indicated by an empty square or circle. What is the probability that individual III-1 has a genotype of Ww? Explain your answer.arrow_forward
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