9. What is the principle of dominance? 10. If two parent's genotypes are Homozygous Dominant (Brown Eyes), and Homozygous Recessive (Blue Eyes), which of the phenotypes would the heterozygous offspring express, and why?

9. What is the principle of dominance? 10. If two parent's genotypes are Homozygous Dominant (Brown Eyes), and Homozygous Recessive (Blue Eyes), which of the phenotypes would the heterozygous offspring express, and why?

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Description: 9. What is the principle of dominance?10. If two parent's genotypes are Homozygous Dominant (Brown Eyes), and HomozygousRecessive (Blue Eyes), which of the phenotypes would the heterozygous offspring express,and why?

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter12: Mendel's Experiments And Heredity

Section: Chapter Questions

Problem 7RQ: Imagine you are performing a cross involving seed color in garden pea plants. What Fi offspring...

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In peas, the allele Le produces tall plants and the allele le produces dwarf plants. The Le allele is dominant to le. If a tall plant is crossed with a dwarf, the offspring are distributed about equally between tall and dwarf plants. What are the genotypes of the parents?
Imagine you are performing a cross involving seed color in garden pea plants. What Fi offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green. 100 percent yellow-green seeds 100 percent yellow seeds 50 percent yellow, 50 percent green seeds 25 percent green, 75 percent yellow seeds
7. The ability to roll your tongue (R) is dominant to lack of this ability (r). A. What is the genotype of a man who can roll his tongue if his father couldn’t? B. If a man who is heterozygous for tongue rolling marries a woman who is heterozygous, what would you predict for the genotypes and phenotypes of their children?
4)If an individual is bald, so you can't tell whether or not they have a widow's peak, but neither parent has a widow's peak, which genotypes are possible? a)Group of answer choices b)Homozygous recessive c)Homozygous dominant d)Heterozygous e)Unable to determine
4) A testcross is used to determine which of the following? a) The phenotype of an individual with a dominant genotype b) The phenotype of an individual with a recessive genotype c)The genotype of an individual with a dominant phenotype d) The genotype of an individual with a recessive phenotype
1)If both parents are heterozygous, which genotypes are possible for their offspring? choose all that apply A)homozygous dominant B)heterozygous C)homozygous recessive D)more information would be needed
2.In dogs, there is a hereditary deafness caused by a recessive allele, d. A kennel owner has a male dog that she wants to use for breeding purposes if possible. The dog can hear, but the owner is unsure of the genotype. She does a testcross (crosses it to a homozygous recessive dog), and two of the five offspring are deaf. This means that the male dog A.has the genotype DD B.has the genotype Dd C.is still of unknown genotype since there were offspring of both deaf and hearing phenotypes. D.has the genotype dd
2)If an individual that is homozygous dominant for a gene has offspring with an individual that is homozygous recessive for that gene, which genotypes are possible for their offspring? choose all that apply A)homozygous dominant B)heterozygous C)homozygous recessive D)more information would be needed
3) How are you able to determine the genotype of a parent if you only know the phenotype of both parents and the offspring? Give an example. 4) What is the purpose of crossing a true breeding dominant organism with an organism expressing a dominant phenotype? What will you learn?
1. What is a pedigree? 2. In a pedigree chart, how would you know if the individual manifesting the trait is carrying a homozygous (dominant/recessive) or heterozygous pair of alleles for the trait? Explain your answer.
1. An albino man whose parents are both normal marries a woman one whose parents is normal and the other albino. She has an albino sister. The couple has a normal son. a. Is albinism a dominant or a recessive trait? Explain your answer. b.Give genotypes of all the persons involved. c. The couple plans to have more kids. What is the probability of their second child being normal?
4. A group of alleles of genes that display a hierarchy of dominance relationships among them is called: