Flower diameter in sunflowers is a quantitative trait. Each upper case allele provides a fixed amount of cm additional in diameter. Each lower case provides a different fixed amount of cm additional in diameter. A plant with 8-cm flowers and aabb genotype is crossed to a plant with 16-cm flowers and a AABB. What is the probability of of getting a 16cm flower in F2? 1/8
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- BIU E I = E E 11 Section 2: Codominance 3. In shorthorn cattle, coat color may be red, white, or roan. Roan is an intermediate phenotype expressed as a patches of red and patches of white hairs. The following data are obtained from various crosses: Red x red all red White x white all white Red x white all roan Roan x roan 25 % red, 50% roan, 25% white a. From these results, determine the appropriate allele symbols and indicate which genotypes lead to which phenotypes. b. What are the genotypes of the parents and offspring in each cross above? C. Predict the results of a red x roan cross. d. Predict the results of a white x roan cross. acerPunnett Squares Practice Monohybrid Crosses DIRECTIONS: All these genetic probiems deal with pea plants and heir traits. Use the following kay for ail problems. Put the gametes for the 1st parent of each cross along the top, and the gametes for the 2nd parent along the left side. T= Tall ( = Short S= Smooth Seed = Wrinkled Seed G= Green Pod Y= Yellow Seed P= Purple Flower g= Yellow Pod 2. TT x TE y- Green Seed A= White Flower 1. PP x PA 3. Sa x Sa 4. yy x yy 5. Gg x Gg PP PA AP YY Yy 99 GG Gg gg SS Sa sa 8. heterozygous yellow seed x green seed TT TE 6. hybrid tall x short Te x t 7. purebrid tall x short TT x 9. hybrid green pod x hybrid green pod 10. hybrid tall x purebred tall YY Yy 99 13. heterozygous purple flowers x TT T TT TE GG Gg gg TT Te 11. purebred purple flowers x white flowers 12. hybrid purple flowers x white flowers 14. hybrid smooth seeds x hybrid smooth seeds 15. short plant x short plant white flowers PP PA AP PP PA AA phenotype ratios: PP PA AE Ss Se TT TE Purple…A heterozygous tall yellow plant is crossed with a homozygous short green. What will be the genotypes 3. and phenotypes, and probabilities of the first generation? Genotype of the heterozygous tall, yellow plant Genotype of the homozygous short, green plant Genotypes Phenotypes Right handedness (R) is dominant over left (r) Browyn eves (B) are dominant over blue (b). A man who is blue eyed and right handed, whose father was left handed, married a left handed woman with brown eyes, whose mother was blue eyed. What are the possible phenotypes and genotypes of the offspring and the probability for each? 4. Genotype of the man Genotype of the woman Genotypes Phenotypes What is the probability of getting right handed offspring? What is the probability of getting blue eyed offspring? What is the probability of getting offspring heterozygous for both traits? What is the probability of getting offspring that are homozygous dominant?
- The R and S loci are 35 m.u. apart. If a plant of genotype of RS/rs is selfed, what progeny phenotype will be seen and in what proportions?What is the difference between incomplete dominance and codominance? * a. The dominant allele completely masks the recessive allele. b. In codominant traits, both alleles are expressed, while incompletely dominant traits mix to create a third phenotype c. In codominance, the traits are mixed; in incomplete dominance, both traits are expressed When organisms reproduce and their offspring demonstrate co-dominance the offspring dominant traits exhibit homsolvnsChi-square Test In the pea plants use by Gregor Mendel in his study, the purple flower color is dominant over white,and the axial position on a branch is dominant over terminal. A plant believed to be heterozygouswas selfed and produced flowers with the following phenotypes: 23 white terminal68 white axial81 purple terminal187 purple axial a. assign alleles to the different traitspurple __________ axial ___________white ___________ terminal _______ b. refer to the image attached
- In garden peas, tall (T) vine is dominant over short (t) vine. Yellow (Y) seed color is dominant over DIHYBRID GENETICS PROBLEMS Name 1. plant. Show the genotypes and phenotypes of the Fi offspring, and the probability of eac Genotype of the homozygous tall, round pea plant Genotype of the homozygous short, wrinkled pea plant. Phenotypes Genotypes 2. green (y) seed color. Cross a heterozygous tall, vellow seeded plant with a heterozygous tall, yeno seeded plant. Genotypes of the parent plants Genotypes Phenotypes What is the probability for a tall offspring? What is the probability for a short offspring? What is the probability for a yellow offspring? What is the probability for a green offspring? What is the probability for a tall yellow offspring? What is the probability for a tall green offspring? What is the probability for a short yellow offspring? What is the probability for a short green offspring?LO 76 Determine the phenotype and genotypes in crosses that involve epialelles. Assume that birds with the genotype L L have blue feathers, and those who have at least one paramutagenic epiallele (L+) have yellow feathers. Determine how many offspring will have blue feathers in a cross between a L+L bird and a L L bird. 50% of females will have blue feathers 0% of the offspring will have blue feathers. 50% of the offspring will have blue feathers. 100% of the offspring will have blue feathers. O 75% of the offspring will have blue feathers. 25% of the offspring will have blue feathersPractice: 1.) Heterozygous A crosses with Heterozygous A. Calculate the probability of each phenotype being passed down to the offspring. TOTALS: (percent and ratio) A: B: AB: O: 2.) Type O breeds with Type AB TOTALS: (percent and ratio) A: B: AB: O: 3.) Woman has type B (exact genotype unknown). Man has type O. What are the possible blood types of their kids? Is this type possible: A: yes/ no? B: yes/ no? AB: yes/ no? O: yes/ no? 3B.) If the woman has a baby with type AB blood, could the man above be the father? Explain you answer.
- In pineapples, leaves may be spiny, spiny-tipped or piping. Pineapples of different phenotypes were used in the following crosses: Pl phenotype piping X spiny P1 genotype Fl phenotype 100% piping F1 genotype Crossing the Fls produced: F2 phenotypes F2 genotypes ww gm 95 piping 25 spiny tipped 8 spiny Using the letters A and B, give the COMPLETE genotypes of ALL the individuals. SOLUTION Get the total of the F2 generationCH 1-4 X с Maya S x Credib x app.wizer.me/learn/00E0AB wizer.me a Maya X A To-do 25% The table gives the genoty Assign x M Dashb x 50% Figurat X C In cows, brown (B) is codominant with white (W). The heterozygous phenotype is brown and white speckles. A farmer decided to cross a brown cow and a white cow in hopes of making all brown and white speckles. What percentage of the offspring will be brown with white speckles? Figurat X 75% Dashboard Incomp X d Interac X Enter class code Go 100%Introduction: A dihybrid cross is a cross between individuals that involves two pairs of contrasting traits. To Predict the results of a dihybrid, cross all possible combinations of the four alleles from each parent must be considered. You will examine a dihybrid cross involving both color and texture. Purple (P), is dominate to yellow (p), and smooth texture (S) is dominant to wrinkled (s). Both parent plants are heterozygous for both traits. Review genetics and the use of Punnett squares in a biology text before doing this experiment.MATERIALS: Assume you have ear of Corn. You need a heterozygous X heterozygous 9:3:3:1, purple/yellow, starchy/sweet. PROCEDURE: From above please write out: The crop The parental (P) cross phenotype, genotype, gametes Cross between two F1 Selfed testcross 1. First let us use a Punnett square to examine the theoretical outcome of the Heterozygous X Heterozygous dihybrid cross. USE a Punnett square. REMEMBER: a phenotype is how the offspring will…