Genetics LAB TI Onion Genetics Part 1. We will begin by looking at onion color. Let's arbitrarily assign the letter "R" for color and say red onions are dominant (R) and white onions are recessive (r). Cross an individual who is heterozygous with an individual who is homozygous recessive. Rr RR 1. What is the genotype of the heterozygous individual? 2. What is the genotype of the homozygous recessive individual? Complete the Punnett square using the alleles you just listed. 3. What are the resulting genotypes and their ratios or %? 4. What are the resulting phenotypes and their ratios or %? Figure 2. Monohybrid Cross for Onion Color. the letter "B" for onion taste.

Genetics LAB TI Onion Genetics Part 1. We will begin by looking at onion color. Let's arbitrarily assign the letter "R" for color and say red onions are dominant (R) and white onions are recessive (r). Cross an individual who is heterozygous with an individual who is homozygous recessive. Rr RR 1. What is the genotype of the heterozygous individual? 2. What is the genotype of the homozygous recessive individual? Complete the Punnett square using the alleles you just listed. 3. What are the resulting genotypes and their ratios or %? 4. What are the resulting phenotypes and their ratios or %? Figure 2. Monohybrid Cross for Onion Color. the letter "B" for onion taste.

Name: Complete the punnet square using the alleles you just listed.Comment:
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Description: Complete the punnet square using the alleles you just listed.Comment: I can see that heterozygous is Rr and Homozygous is RR. But I still don’t understand how to do the punnet square. Genetics LAB 11Onion GeneticsPart 1. We will begin by looking at o

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter19: The Evolution Of Populations

Section: Chapter Questions

Problem 1VCQ: Figure 19.2 In plants, violet flower color (V) is dominant over white (v). If p = .8 and q = 0.2 in...

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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
SUBJECT: GENETICS Topic: Probability 1. Consider albinism a trait to occur in a human family. If two parents areheterozygous for such trait, the probability of having a normally pigmented child is 3//4 and having an albino child is ¼. What is the probability that 2 will be normal and 1 will be albino?
1) Janet and her family members have attached earlobes (recessive trait). However, her maternal grandmother has unattached earlobes. What is the genotype of her maternal grandmother? _____________________ Janet’s maternal grandfather passed away ten years ago. What could have been his genotype?______________________________
Which is one of the seven characteristics that Mendel observed in pea plants? flower size seed texture leaf shape stem color
The phenotype of individuals heterozygous for ________ alleles comprises both homozygous phenotypes. a. epistatic b. codominant c. pleiotropic d. hybrid
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?
Individuals affected by a condition known as polydactyly have extra fingers or toes. The following pedigree shows the pattern of inheritance of this trait in one family: From the pedigree, can you tell if polydactyly comes from a dominant or recessive allele? Is the trait sex-linked? As far as you can determine, what is the genotype of each person in the pedigree with respect to the trait?
Figure 19.2 In plants, violet flower color (V) is dominant over white (v). If p = .8 and q = 0.2 in a population of 500 plants, how many individuals would you expect to be homozygous dominant (VV), heterozygous (Vv), and homozygous recessive (vv)? How many plants would you expect to have violet flowers, and how many would have white flowers?
A testcross is a way to determine ________. a. phenotype b. genotype c. dominance
Design an Experiment Imagine that you are a breeder of Labrador retriever dogs. Labs can be black, chocolate brown, or yellow. Suppose that a yellow Lab is donated to you and you need to know its genotype. You have a range of dogs with known genotypes. What cross would you make to determine the genotype of the donated dog? Explain how the resulting puppies show you the Labs genotype.
Having malformed hands with shortened fingers is a dominant trait controlled by a single gene; people who are homozygous for the recessive allele have normal hands and fingers. Having woolly hair is a dominant trait controlled by a different gene; homozygous recessive individuals have normal, nonwoolly hair. Suppose a woman with normal hands and nonwoolly hair marries a man who has malformed hands and woolly hair. Their first child has normal hands and nonwoolly hair. What are the genotypes of the mother, the father, and the child? If this couple has a second child, what is the probability that it will have normal hands and woolly hair?
Imagine you are trying to test whether a population of flowers is undergoing evolution. You suspect there is selection pressure on the color of the flower: bees seem to cluster around the red flowers more often than the blue flowers. In a separate experiment, you discover blue flower color is dominant to red flower color. In a field, you count 600 blue flowers and 200 red flowers. What would you expect the genetic structure of the flowers to be?