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1. In maize, the following genes are linked on chromosome 3: va - variable sterile v - virescent gl - glossy leaves Two homozygous plants were crossed and produced an all normal F1. When the F1 was test-crossed, progeny phenotypes appeared as follows: 235 virescent 7.glossy 60 wild Diagram the chromosome map for the 3 loci Example: a--1.00 cM--b--2.00 CM--c--3.00 CM 40 variable sterile 270 variable sterile, glossy 62 variable sterile, virescent, glossy 48 virescent, glossy 4 variable sterile, virescent

1. In maize, the following genes are linked on chromosome 3: va - variable sterile v - virescent gl - glossy leaves Two homozygous plants were crossed and produced an all normal F1. When the F1 was test-crossed, progeny phenotypes appeared as follows: 235 virescent 7.glossy 60 wild Diagram the chromosome map for the 3 loci Example: a--1.00 cM--b--2.00 CM--c--3.00 CM 40 variable sterile 270 variable sterile, glossy 62 variable sterile, virescent, glossy 48 virescent, glossy 4 variable sterile, virescent

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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1. In maize, the following genes are linked on chromosome 3: va - variable sterile v - virescent gl - glossy leaves Two homozygous plants were crossed and produced an all normal F1. When the F1 was test-crossed, progeny phenotypes appeared as follows: 235 virescent 7.glossy 60 wild 40 variable sterile 270 variable sterile, glossy 62 variable sterile, virescent, glossy Diagram the chromosome map for the 3 loci Example: a--1.00 cM--b--2.00 CM--c--3.00 CM Significant # of decimal places for answer: 2 Answer: 48 virescent, glossy 4 variable sterile, virescent 2. Two hypothetical autosomal human genes are 10 cM apart. These dominant alleles are completely penetrant and respectively cause crossed eyes (e+) and small thumbs (th+). A cross-eyed, small thumbed woman marries a normal man and they have 4 children. Two of the children are cross-eyed and two of the children have small thumbs. The woman is pregnant with a 5th What is the probability that this child will be cross-eyed and have small thumbs? Express answer in percentage form, 2 decimal places only. 3. In maize, the following genes are linked on chromosome 3: va - variable sterile v - virescent gl - glossy leaves Two homozygous plants were crossed and produced an all normal F1. When the F1 was test-crossed, progeny phenotypes appeared as follows: 235 virescent 40 variable sterile 7.glossy 270 variable sterile, glossy 60 wild What are the genotypes of the P1 and P2? a. Pl: +++/+++ x v va gl/v va gl P2: v ++/+ va gl x v va gl/v va gl b. Pl: +++/v va gl x v va gl/ v va gl P2: v va gl/+++ x v va gl/v va gl c. Pl: +++/v va gl x +++/ v va gl P2: v va gl/ +++ x v va gl/v va gl d. Pl: +++/v va gl x +++/ v va gl P2: v va gl/+++ x v va gl/ +++ 48 virescent, glossy 4 variable sterile, virescent 62 variable sterile, virescent, glossy 4. A farmer who wants to get into the milk business has bought a small beginning herd of 12 heterozygous cows all of which have 2 dominant cis-linked genes: production of high quantities of milk (+) and high fertility (+). The recessive alleles are (m) and (f) respectively. The two genes are 25 cM apart on chromosome 3. Two of the farmer's nearby neighbors own bulls that are also heterozygous for these traits. The first neighbor's bull has the same alleles linked as his cows, but the second neighbor's bull has one dominant and one recessive allele from each trait on each homolog. What are the respective genotypes of the first and second neighbor's bulls? Example: ++/a b and ++/ b c Answer: 5. Two of the pairs of genes in corn are: Pl purple plant (Pl) vs. green plant (pl) and tall (Py) plant vs. dwarf (py) plants. These genes are 20 cM apart on chromosome 6. Two cis-heterozygous plants were crossed. What is the gamete genotype ratio produced by each parent? Example: 0.1 ab/ab; 0.2 ab/ab; 0.3 ab/ab; 0.4 ab/ab Significant # of decimal places for answer: 1 Answer:
Transcribed Image Text:1. In maize, the following genes are linked on chromosome 3: va - variable sterile v - virescent gl - glossy leaves Two homozygous plants were crossed and produced an all normal F1. When the F1 was test-crossed, progeny phenotypes appeared as follows: 235 virescent 7.glossy 60 wild 40 variable sterile 270 variable sterile, glossy 62 variable sterile, virescent, glossy Diagram the chromosome map for the 3 loci Example: a--1.00 cM--b--2.00 CM--c--3.00 CM Significant # of decimal places for answer: 2 Answer: 48 virescent, glossy 4 variable sterile, virescent 2. Two hypothetical autosomal human genes are 10 cM apart. These dominant alleles are completely penetrant and respectively cause crossed eyes (e+) and small thumbs (th+). A cross-eyed, small thumbed woman marries a normal man and they have 4 children. Two of the children are cross-eyed and two of the children have small thumbs. The woman is pregnant with a 5th What is the probability that this child will be cross-eyed and have small thumbs? Express answer in percentage form, 2 decimal places only. 3. In maize, the following genes are linked on chromosome 3: va - variable sterile v - virescent gl - glossy leaves Two homozygous plants were crossed and produced an all normal F1. When the F1 was test-crossed, progeny phenotypes appeared as follows: 235 virescent 40 variable sterile 7.glossy 270 variable sterile, glossy 60 wild What are the genotypes of the P1 and P2? a. Pl: +++/+++ x v va gl/v va gl P2: v ++/+ va gl x v va gl/v va gl b. Pl: +++/v va gl x v va gl/ v va gl P2: v va gl/+++ x v va gl/v va gl c. Pl: +++/v va gl x +++/ v va gl P2: v va gl/ +++ x v va gl/v va gl d. Pl: +++/v va gl x +++/ v va gl P2: v va gl/+++ x v va gl/ +++ 48 virescent, glossy 4 variable sterile, virescent 62 variable sterile, virescent, glossy 4. A farmer who wants to get into the milk business has bought a small beginning herd of 12 heterozygous cows all of which have 2 dominant cis-linked genes: production of high quantities of milk (+) and high fertility (+). The recessive alleles are (m) and (f) respectively. The two genes are 25 cM apart on chromosome 3. Two of the farmer's nearby neighbors own bulls that are also heterozygous for these traits. The first neighbor's bull has the same alleles linked as his cows, but the second neighbor's bull has one dominant and one recessive allele from each trait on each homolog. What are the respective genotypes of the first and second neighbor's bulls? Example: ++/a b and ++/ b c Answer: 5. Two of the pairs of genes in corn are: Pl purple plant (Pl) vs. green plant (pl) and tall (Py) plant vs. dwarf (py) plants. These genes are 20 cM apart on chromosome 6. Two cis-heterozygous plants were crossed. What is the gamete genotype ratio produced by each parent? Example: 0.1 ab/ab; 0.2 ab/ab; 0.3 ab/ab; 0.4 ab/ab Significant # of decimal places for answer: 1 Answer:
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