Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 44.5, Problem 2CS
Summary Introduction
To draw: A Punnett square and a pedigree to predict the ratios of genotypes and
Introduction: The defective ability by which a person cannot see a color or cannot tell differences in color is termed as color blindness. There are several types of color blindness such as red-green color blindness, blue-yellow color blindness and so on.
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PRACTICE EXERCISES 2:
1.
For instance, in cows, red (R) and white (W) are
two possible hair colors. However, when a red cow and a
white cow mate, instead of one color being dominant over
the other, BOTH are expressed, in a color called roan
(red-and-white). Fill out the genotypes below:
Homozygous red:
Homozygous white:
Roan:
Show the Punnett Square for a cross between two roan cows:
Probability of roan offspring:
Probability of red offspring:
Probability of white offspring:
%
2 If R is the allele for red and W is the allele for white in a flower, and
this is codominance, show what happens if a red flower is crossed
with a white flower.
Red genotype:
White genotype:
Phenotype (offspring):
Genotype (offspring):
Name
Period
into the genetics problem.
Genetics Worksheet # 2
1. In pea plants, smooth peas (S) are dominant to wrinkled peas (s). Work the following crosses.
a. homozygous dominant x recessive
Genotypes:
Phenotypes:
Genotypic ratio:
Phenotypic ratio:
b. heterozygous x heterozygous
Genotypes:
Phenotypes:
Genotypic ratio:
Phenotypic ratio:
2, A man and his wife are both heterozygous for brown eyes (B). They have six children all of
whom have blue eyes> How can this happen?
List the genotypes of the parents and the children. Show the Punnett square.
Parents:
Kids:
What is the chance that the next child will have blue eyes?
Activity 4
Identification of phenotype of known genotype
The characteristic of the color of the red tomato fruit (R) is dominant over the
characteristic of the yellow color (r) The characteristic of the color of white flowers
(W) is dominant over the characteristic of the color of the yellow flowers (w), and the
characteristic length of the stem of the plant (T) is dominant over the short characteristic
(t)
If a red fruit plant with yellow and long-stemmed flowers is crossed, with anotheryellow,
white-flowered and short-stemmed plant, knowing that the dominant characteristic is
pure. What is the phenotype of individuals of the resulting generation?
Chapter 44 Solutions
Biology
Ch. 44.1 - Prob. 1CSCh. 44.2 - Prob. 1CCCh. 44.2 - Prob. 1CSCh. 44.2 - Prob. 2CCCh. 44.2 - Prob. 2CSCh. 44.2 - Prob. 3CCCh. 44.4 - Prob. 1CCCh. 44.5 - Prob. 1CSCh. 44.5 - Why is red-green color blindness rare in females?Ch. 44.5 - Prob. 2CS
Ch. 44.5 - Prob. 2CCCh. 44.6 - Prob. 1EQCh. 44.6 - CoreSKILL Of the two hypotheses explaining how...Ch. 44.6 - Prob. 3EQCh. 44.6 - Prob. 1CCCh. 44 - The process in which incoming sensory stimulation...Ch. 44 - Prob. 2TYCh. 44 - ______blanksense pain; ______blank sense heat or...Ch. 44 - Prob. 4TYCh. 44 - In which process(es) are hair cells involved? a....Ch. 44 - Prob. 6TYCh. 44 - In the mammalian eye, light from near or far...Ch. 44 - Prob. 8TYCh. 44 - Prob. 9TYCh. 44 - The stimulation for olfaction involves odorant...Ch. 44 - Prob. 1CQCh. 44 - Prob. 2CQCh. 44 - Prob. 3CQCh. 44 - Discuss the several types of sensory stimuli that...Ch. 44 - Prob. 2COQ
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- C. Solve these problems by listing the given genotypes, test crosses, genotypic and phenotypic ratios. 1. A plant with serrated leaf margins (A^aA^a) is crossed with a plant with smooth leaf margins (A^bA^b). What will be the phenotypic and genotypic ratios if a homozygous plant with serrated leaves is crossed with a plant with wavy leaves? Given: Test Cross: Genotypic Ratio: Phenotypic Ratio: (Note: if you have provided a punnett square solution, plus 3 bonus points hehehe)arrow_forwardDirection: Answer the following problems: 1. Predict the phenotypic ratios of offspring when a homozygous white cow is crossed with a roan bull. Illustrate using a Punnett square. 2. Complete the Punnett square for a cross between a black chicken (BB) and a white chicken (WW). Give the phenotype of the offspring in the F1 generation. Кey BB – black ww- white F1 BW – checkered Phenotype:arrow_forwardName: Per: Date: Dihybrid Cross Practice Problems 1. Set up a Punnett square using the following information: Dominate allele for tall plants =D Recessive allele for dwarf plants = d Dominate allele for purple flowers = W Recessive allele for white flowers = w Cross a homozygous dominant parent with a homozygous recessive parent. Using the Punnett square above: a. What is the probability of producing tall plants with purple flowers? Possible genotype(s)? b. What is the probability of producing dwarf plants with white flowers? Possible genotype(s)? c.What is the probability of producing tall plants with white flowers? Possible genotype(s)? d. What is the probability of producing dwarf plants with purple flowers? Possible genotype(s)?arrow_forward
- Switch Background P Immersive Reader 100% Page Width d. What percent of the offspring will be carriers of the white eye trait? 2. Using the same information as for question #1, cross a heterozygous red-eyed female with a red-eyed male. a. What are the genotypes of each parent? ic b. What fraction of the children will have red eyes? c. What fraction of the children will have white eyes? Pra d. What fraction of the female children will carry the white eyed trait?arrow_forwardInstructions: Answer the following problem using the punett square and identify its Genotypic ratio and Phenotypic ratio. 1. A homozygous round-seeded plant (RR) is crossed with a homozygous wrinkle-seeded plant (rr). What is the phenotypic and genotypic ratio of their offspring? Genotypic Ratio Phenotypic Ratio- 2. A heterozygous green-colored pod (Gg) is crossed with a yellow-colored pod (gg). Predict the Genotypic and Phenotypic ratio of their offspring. Genotypic Ration Phenotypic Rationarrow_forwardDirection: Read and understand the ff. set of monohybrid cross problems and answer each problem by showing the Punnett square, genotypes ans phenotypes. 3. In tomatoes, red fruit (R) is dominant over yellow fruit (r). A plant that is homozygous for red fruit is crossed with a plant that has yellow fruit. What would be the genotypes and phenotypes? 4. If two of the first generation offspring from the problem above were mated, what would be the genotypes and phenotypes of the second generation?arrow_forward
- Direction: Read and understand the ff. set of monohybrid cross problems and answer each problem by showing the Punnett square, genotypes ans phenotypes. 2. Horniess (H) in cattle is dominant over horned (h). A homozygous hornless bull is mated with a homozygous horned cow. What will be the genotype and phenotype of the first generation?arrow_forwardThis exercise primarily addresses o MLO 1: Correctly assign and interpret allele symbols according to the conventions of the fruit fly research community. o MLO 2: Correctly assign genotypes and phenotypes to parents and offspring in genetic crosses given a mode of inheritance. Autosomal Recessive Inheritance We learned in the Linkage Mapping lab module the conventions for representing alleles in fruit flies. Recall that we use one to three letters, and the case (upper or lower) is determined by whether the mutant allele is recessive or dominant. Additionally, we add a "+" as a superscript to indicate the wild-type ("normal") allele. For example, if a new mutant phenotype is recessive, we can represent the recessive allele as m. Then the wild-type allele is mt, and m+ > m. Based on the rule of dominance, we can predict phenotypes based on genotypes: mm Wild type Wild type Mutant m+m mmarrow_forwardName Legrning Target: I will incorporate ratios Period into the genetics problem. Genetics Worksheet # 2 1. In pea plants, smooth peas (S) are dominant to wrinkled peas (s). Work the following crosses. a. homozygous dominant x recessive Genotypes: Phenotypes: Genotypic ratio: Phenotypic ratio: b. heterozygous x heterozygous Genotypes: Phenotypes: Genotypic ratio: Phenotypic ratio: 2, A man and his wife are both heterozygous for brown eyes (B). They have six children all of whom have blue eyes> How can this happen? List the genotypes of the parents and the children, Show the Punnett square, Parents: Kids: What is the chance that the next child will have blue eyes?arrow_forward
- Monohybrid Cross Worksheet Directions: Answer each of the following questions using a Punnett Square and the rules of monohybrid crosses. The allele for dimples (D) is dominant to the allele for no dimples (d). A man heterozygous for dimples marries a woman who is also heterozygous for dimples. What is the man’s genotype and the woman’s genotype? What is the man’s phenotype and the woman’s phenotype? Do a cross to determine all potential dimple genotypes and phenotypes for the offspring of this man and woman. The allele for hitchhiker’s thumb (h) is recessive to straight thumb (H). If a man and his wife are both homozygous recessive, will any of their offspring potentially have hitchhikers thumb? What is the man’s genotype and the woman’s genotype? What is the man’s phenotype and the woman’s phenotype? What genotype(s) must the offspring have in order to have the phenotypic trait of hitchhiker’s thumb? Do a cross to determine all potential hitchhiker’s…arrow_forward-E. Bandching Tubes E Learning Task 5: Read and understand the pattern of inheritance in multiple alleles. Answer the guide question in your notebook. Multiple Alleles Mendel studied just two alleles of his pea genes, but real populations of- ten have multiple alleles of a given gene. In this activity you will learn how to crossed the gene for coat color in rabbits (the C gene) which comes in four color alleles (C, Cch, Ch, c) as shown by the figure below. Genotype HIMALAYAN Using the given genotypes, find the F! and F2 generation of the crosse black rabbit and chinchilla, the crossed of himalayan and albino. Use the Punnet etwe A. Black (CC) x Chinchilla (CchCoh) squares below to guide you. F1 Offspring with corresponding % F2 Offspring with corresponding % Guide Question 1. Based on the results of the genetic crosses you have shown, how do you think the red and white flower alleles can "interact with one another? Explain both the F1and F2 generations. 2. How are the results of the…arrow_forwardTopic: Modifications of Mendelian Genetics LEARNING ACTIVITY and ASSESSMENT 1. In addition to the ABO blood group, many others have been identified in humans. One such group is the MN group, controlled by two codominant alleles, M and N, at one locus. What will be the probability of the genotypes and phenotypes that would be produced in crosses involving the following phenotypes: а. Туре М and type N b. Туре М and type MN c. Type N and type N d. Type MN and type MN 2. Could a child of type N result from the mating of M and MN? Justify your answer.arrow_forward
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