2. In daffodils, an allele for yellow flowers (D) is dominant, while an allele for white flowers (d) is recessive. An allele for smooth petals (F) is dominant over an allele for frilled petals (f). The two traits demonstrate independent assortment. A plant that is homozygous for yellow and smooth petals is crossed with a plant that is white and frilled. A resulting F1 plant is then crossed with a plant that is white and frilled, and the following progeny are produced: 56 yellow and smooth; 53 yellow and frilled, 59 white and smooth, and 8 white and frilled. 2a Uce a chi cGuare toct to cempare the obcerved pumb ers with thece oxnocted for the E

2. In daffodils, an allele for yellow flowers (D) is dominant, while an allele for white flowers (d) is recessive. An allele for smooth petals (F) is dominant over an allele for frilled petals (f). The two traits demonstrate independent assortment. A plant that is homozygous for yellow and smooth petals is crossed with a plant that is white and frilled. A resulting F1 plant is then crossed with a plant that is white and frilled, and the following progeny are produced: 56 yellow and smooth; 53 yellow and frilled, 59 white and smooth, and 8 white and frilled. 2a Uce a chi cGuare toct to cempare the obcerved pumb ers with thece oxnocted for the E

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?
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The dominant C allele of a gene that controls color in corn produces kernels with color; plants homozygous for a recessive c allele of this gene have colorless or white kernels. What kinds of gametes, and in what proportions, would be produced by the plants in the following crosses? What seed color, and in what proportions, would be expected in the offspring of the crosses? a. CCCc b. Cccc c. CcCc
Consider a cross to investigate the pea pod texture trait, involving constricted or inflated pods. Mendel found that the traits behave according to a dominant/ recessive pattern in which inflated pods were dominant. If you performed this cross and obtained 650 inflated-pod plants in the F2 generation, approximately how many constricted-pod plants would you expect to have? 600 165 217 468
2) A researcher crossed a heterozygous yellow seed plant (Yy) and a recessive green seedplant (yy). Draw a Punnett Square and determine the genotype and phenotype ratios ofthe offspring.
1. If a purebred pea plant with purple flowers was crossed with a purebred pea plant with white flowers, all of the offspring's flowers ended up being purple. In this instancethe WHITE flower trait is considered to be what?
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
1. Alleles of the gene that determines seed coat patternsin lentils can be organized in a dominance series:marbled > spotted = dotted (codominant alleles) >clear. A lentil plant homozygous for the marbled seedcoat pattern allele was crossed to one homozygous forthe spotted pattern allele. In another cross, a homozygous dotted lentil plant was crossed to one homozygous for clear. An F1 plant from the first cross wasthen mated to an F1 plant from the second cross.a. What phenotypes in what proportions are expectedfrom this mating between the two F1 types?b. What are the expected phenotypes of the F1 plantsfrom the two original parental crosses?
4.) A man and a woman have a child. The father is blood type A, and one of his parents was blood type A and the other was blood type O. The mother is blood type B, and one of her parents was blood type B, the other type O. Both the father and the mother are carriers of the Bombay allele. (Neither of the type-O grandparents were type O because of the Bombay allele – they had the regular type O genotype.) WhataretheoddsthattheirbabywillhavebloodtypeO? WhataretheoddsthattheirbabywillhavebloodtypeAB? (Hint – for this question, you should draw out a pedigree and fill in as much as you can for the genotypes of BOTH genes that are involved.)
1. A gardener harvested 3,697 seeds from cross breeding a pure line red-flower petunia and pure line white-flower petunia. Then, he planted the harvested seeds in a 25x25 m plot. He was shocked that all of his planted petunias produced red flowers. Why? A. The red flower petunia is a dominant trait. B. The red flower petunia is a recessive trait. C. The white flower petunia is a dominant trait. D. The white flower petunia has a heterozygous genotype in flower color. 2. A veterinary doctor found a long tail female cat along the way going to her clinic. She wanted to know if the long tail female cat is a pure breed/line or not? So as a Biology student with genetic subject, which of the following choices can you correctly suggest to her? Considering the long tail trait as dominant trait. A. She must cross breed it with a short tail female cat B. She must do a back cross breeding with a short tail male cat C. She must run a molecular test for the long tail female cat…
1. In a test cross, a homozygous recessive parent (mm) and a homozygous dominant parent (MM) are crossed. What is the genotypic probability of the offspring? * a. 100% Mm b. 100% mm c. 50% Mm and 50% mm d. 75% Mm and 25% mm e. 50% dominant and 50% recessive f. 100% dominant 2. After performing an experiment on monohybrid cross about the shape of the pea seeds, data were obtained from the result. There are 87 wrinkled pea seeds and 313 round seeds. Of course, round seed is dominant over wrinkled seed. What is the expected value or ratio for the wrinkled seed? * a. 21.75 b. 65.25 c. 100 d. 300 e. 400 f. None of the choices 3.After performing an experiment on monohybrid cross about the shape of the pea seeds, data were obtained from the result. There are 87 wrinkled pea seeds and 313 round seeds. Of course, round seed is dominant over wrinkled seed. What will be the computed chi-square value? * a. 9.75 b. 5.25 c. 4.75 d. 3.00 e. 2.26 f. 2.25 g. 1.69 h. 0.56 i. None of the choices 4.…
4. The ruffed chicken has an under-chin wattle. A smooth wattle (S) is dominant over a wrinkled wattle (s). A red wattle (HR) is incompletely dominant with a white wattle (HW) so that an individual with HRHW will have a pink wattle. A chicken with a wrinkled red wattle is mated to a homozygous chicken with a smooth white wattle. What is the genotype and phenotype of the chicks?