A dihybrid cross gives a phenotypic ratio of 5:3 (or 10:6) instead of 9:3:3:1. What phenotypic ratio would you expect in a testcross of the double heterozygous hybrid? Question options: 1:1:1:1 1:1 1:2:1 3:1
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A dihybrid cross gives a
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- DIHYBRID CROSS Heterozygous Yellow and heterozygous round seed crossed with homozygous yellow and heterozygous round seed. Find the following: 1. Alleles of both parents (given problems) 2. Genotype 3. Phenotype ratio 4. Write the punnet square -Please answer this on the paper and explain the answer step by step. Thank you asapA dihybrid cross gives a phenotypic ratio of 5:3 (or 10:6) instead of 9:3:3:1. What phenotypic ratio would you expect in a testcross of the double heterozygous hybrid? O1:1:1:1 1:1 3:1 O1:2:1Fruit fly body color is wild type (meaning normal) Gray = B+ and black = b Fruit fly wing type is wild type normal wings = vg+ and vg = vestigial A fly which was heterozygous for both traits was crossed with a fly that was recessive for both traits. Write the genotype and phenotype that would be expected from this cross. Write the genotype and phenotype percentages that would be expected from this cross.
- What would justify the following ratio appearing after phenotyping the outcome of a crossing trial: 8.9: 2.9: 3.2:1? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b C d Obviously this represents independent assortment based on crossing dihybrid heterozygotes. Obviously this represents gene linkage based on test crossing a dihybrid heterozygote. Obviously this represents the results of a trihybrid test cross. Obviously this represents independent assortment based on crossing monohybrid heterozygotes.F1 hybrid is obtained from the following cross: Parent 1: AB/AB; d/d; E/E Parent 2: ab/ab; D/D; e/e Assume that all genes are sorted independently except for genes A and B, which are tightly linked and show zero recombination. Following a testcross of F1, what proportion of the F2 progeny will be phenotypically like parent 1? O 1/32 1/8 O 1/16 O 1/4 O9/64pt pt PT PPTt purple tall PpTt purple tall Pt Pptt purple white Pptt purple white Using any two plants resulting from your test cross (even two of the same genotypes if you would prefer), perform a second cross. Provide a Punnett square demonstrating this dihybrid cross.What are the ratios for each genotype in the resulting offspring? What are the ratios for each phenotype? Your answer should clearly indicate the genotype and phenotype each portion of the ratio is referring to
- A diploid trihybrid plant was testcrossed. Each of the three genes determines a single Mendelian trait. Two of the three genes are closely linked and crossover never occurs between them. What proportion of the progeny phenotypically resembles the trihybrid plant itself? Question 4 options: 1/2 1/4 1/16 1/8Consider the following F2 progeny for a 3-point cross, the same cross as presented in question 9. AaBbCc 26 AaBbce 5 AabbCc 212 aaBbce 328 | aabbcc 7 aabbcc 22 total 600 What is the distance between gene B and gene C? ○ 2 CM 10 CM 12 CM 08CM 29 MacBook AirWhat are the phenotypes? What is the ratio of those phenotypes? The phenotypes would be: (a) Yellow with smooth (b) Yellow with wrinkled 3:1 Part 2: Data Tables Table 1: Parent Genotypes: Monohybrid Crosses Generation Genotype of Individual #1 Genotype of Individual #2 P Yy Ss P1 Yy Ss P2 Yy ss P3 Yy SS P4 YY SS Table 2: Generation Data Produced by Monohybrid Crosses Generation Possible Offspring Genotypes Possible Offspring Phenotypes Genotype Ratio Phenotype Ratio P yySs P1 yySs P2 Yyss P3 YySS P4 YYSS Part 2: Post-Lab Questions How much genotypic variation do you find in the randomly picked parents of your crosses? How much in the offspring? Pool all of the offspring from your five replicates. How much phenotypic variation do you find? Is the ratio of observed…
- Using the punnet square solve the following:Please work out this Di-Hybrid cross . -Mom is homozygous dominant for both traits -Dad is homozygous recessive for both traits Trait Key:S= Straights= CurlyL= Long l= Short 1st Question to answer ---- How many of the offspring come out straight & long? 2nd Question to answer ---- How many of the offspring come out curly & short?4-6. In pea plants, the tall condition (T) is dominant over the dwarf condition (t). For each of the following crosses, give the expected genotypic and phenotypic ratios in the offspring. Instructions: Enter the number in the box that matches the crosses with the genotypic and phenotypic ratios.In a cross between mice the genotypes AB/ab ab/ab, what is the recombination frequency if the progeny numbers are 72 AB/ab, 68 ab/ab, 17 Ab/ab, and 21 aB/ab? The alleles are shown for each chromosome, separated by a slash (/).
