3. What is the genotypic ratio of the testcrossshown in Figure 4?4. Give the phenotypic and genotypic ratio of thefollowing testcrosses of dihybrids:Cross ACross BPΥY RRyy rrPYY Rryy rrF1F,YRYy RrYRҮy Rr(YYy rrCross CCross DP.Yy RRyy rrPYy Rryy rrF,F,(yrY RYy RrY RYy Rry Ryy RrYy rr(y Ryy Rryy rr evious observations, he noticed something new. The inheritanced shape was not dependent on each other. The frequency of rouas highest since both of them were dominant traits, while theequency were the lowest, since both of them were recessive trency of round green seeds and wrinkled yellow seeds was theDihybrid CrossYYRRP GenerationF GenerationYyRrPhenotype:gametes from heterozygous parentYRyRYryrF2 GenerationYRYYRRYYRRYYRRYyRrPhenotype:9:3:3:yRYYRR yRRYyRryyRrYrYYRRYyRrYYrrYyrryrYyRryyRrYyrryyrrFigure 4. Dihybrid cross of pea plants.el carried out a number of dihybrid crosses for pairs of c- THgametes from heterozygous parent1.

Name: 3. What is the genotypic ratio of the testcrossshown in Figure 4?4. G
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: 3. What is the genotypic ratio of the testcrossshown in Figure 4?4. Give the phenotypic and genotypic ratio of thefollowing testcrosses of dihybrids:Cross ACross BPΥY RRyy rrPYY Rryy rrF1F,YRYy RrYRҮy Rr(YYy rrCross CCross DP.Yy RRyy rrPYy Rryy rrF,

Answered: 3. What is the genotypic ratio of the…

Science

Biology

3. What is the genotypic ratio of the testcross shown in Figure 4?

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter13: Observing Patterns In Inherited Traits

Section: Chapter Questions

Problem 9GP: Red-flowering snapdragons are homozygous for allele RI. White-flowing snapdragons are homozygous for...

See similar textbooks

Similar questions

Red-flowering snapdragons are homozygous for allele RI. White-flowing snapdragons are homozygous for a different allele (R2). Heterozygous plants (R1 R2) bear pink flowers. What phenotypes should appear among first-generation offspring of the crosses listed? What are the expected proportions for each phenotype? a. R1R1 R1R2 b. R1R1 R2R2 c. R1R2 R1R2 d. R1R2 R2R2
In cats, the genotype AA produces tabby fur color; Aa is also a tabby, and aa is black. Another gene at a different locus is epistatic to the gene for fur color. When present in its dominant W form (WW or Ww), this gene blocks the formation of fur color and all the offspring are white; ww individuals develop normal fur color. What fur colors, and in what proportions, would you expect from the cross AaWw Aa Ww?
A testcross is a way to determine ________. a. phenotype b. genotype c. dominance
In sweet pea plants, an allele for purple flowers. (P) is dominanl when paired with a recessive allele for red flowers (p). An allele for Jang pollen grains (L) is dominant when paired with a recessive allele for round pollen grains (L). Bateson and Punnett crossed a plant having purple flowers and long pollen grains with one having white flowers and round pollen grains. All F1 offspring have purple flowers and long pollen grains. Among the F2 generation, the researchers observed the following phenotypes: 296 purple flowers/long pollen grains 19 purple /lower/ round pollen grains 27 red flowers/long pollen grains 85 red flowers/round pollen grains What is the best explanation for these results?
Figure 12.16 In pea plants, purple flowers (P) are dominant to white flowers (p) and yellow peas (Y) are dominant to green peas (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares do you need to do a Punnett square analysis of this cross?
Some recessive alleles have such a detrimental effect that they are lethal when present in both chromosomes of a pair. Homozygous recessives cannot survive and die at some point during embryonic development. Suppose that the allele r is lethal in the homozygous rr condition. What genotypic ratios would you expect among the living offspring of the following crosses? a. RRRr b. RrRr
1) By decomposing the cross, MmNn X Mmnn, into single gene outcomes, the possibility of obtaining a double recessive outcome for the ‘N’ gene is: a) 50%! b) 100! c) 0%! d) 25%! 2) A 16-square Punnett is time-consuming to draw out. Dr. Thompson can easily solve this problem by decomposing her dihybrid crosses into separate monohybrid Punnett squares, which would also be quicker than using a forked line diagram. If so, how many individual monohybrid Punnett squares will she need to draw? a) Four Punnett squares. b) Two Punnet squares. c) One Punnett square. d) Sixteen Punnett squares since there are 16 possible outcomes.
2. Show the cross and provide full justification in each case:a) An F1 x F1 self-fertilization gives a 9:7 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1? b) An F1 x F1 self-fertilization gives a 9:3:4 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1? c) An F1 x F1 self-fertilization gives a 15:1 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1?
7. In guinea pigs, black hair colour (B) is dominant and brown hair colour (b) is recessive. Long hair (L) is dominant and short hair (l) is recessive. Answer the following questions: (a) Diagram the cross: BbLl x BbLL (b) What are the phenotypes of the parent generation? (c) What are the genotypes and phenotypes of the F1 generation?
1. A man with O blood type marries a woman with AB blood type. What are the expected genotypic and phenotypic ratios for the children? a) What is the genotypic ratio of the above cross (Write number next to genotype)? ___________________________________________________________________ b) What is the phenotypic ratio of the above cross? (Write number next to phenotype)? ___________________________________________________________________
1. a. Examine the following image showing the results of an ALU insert gel-like. The first lane is the molecular marker. How many + alleles are represented in lanes 2-8? Assume each lane is an individual's amplified diploid DNA. b.The first lane is the molecular marker. How many - alleles are represented in lanes 2-8? Assume each lane is an individual's amplified diploid DNA. c.The first lane is the molecular marker. If lanes 2-8 represent the seven students in the class, what is the frequency of the + allele in this small population? d. If this gel represents the genotypes of all 7 students in a class, what is the EXPECTED number of people that would have a +/+ genotype if this small population were in Hardy-Weinberg equilibrium? (To nearest tenth)
8. In guinea pigs, the allele for black fur (B) is dominant over the allele for white fur (b). Similarly, the allele for straight hair (H) is dominant over the allele for having rough hair (h). Pure breeding rough haired guinea pigs with black fur were crossed with pure breeding straight haired guinea pigs with white fur. a. State the genotype and the phenotype of the F1 individuals produced as a result of this cross.b. Two F1 offspring were mated together. Calculate the expected ratio of phenotypes in the F2 generation.c. Show the completed Punnett square below.