Table 36.4 Genotypic and Phenotypic Characteristics of Offspring Genotype of Organism Allele Trait Phenotype of Organism Allele from Mom from Dad Cystic fibrosis C C Normal for CF Ear shape Finger number Blood type Insulin production ability Hair color 4. Compare the phenotype of your offspring with the phenotype of both parents. 5. Compare the phenotypes of all offspring produced in class. 6. Fertilization (the joining of two haploid gametes) results in a diploid zygote which will develop into a new individual organism. What effect does being diploid rather than haploid have on determining what the phenotype will be?
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To compare the phenotype of your offspring with the phenotype of both parents, you would need to look at the specific traits mentioned in Table 36.4. For example, if the genotype of the offspring for the cystic fibrosis trait is "Normal for CF," then the phenotype Show more…
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BIOL 366 Chapter: Relationships between alleles For each question, do the following: - List the number of genes involved. - List the number of alleles involved. - Identify symbols and genotypes phenotypes. Note that X or Y-linked traits in humans are typically listed as superscripts (e.g. Xo dominant or Xa recessive). - List the genotypes of the parents. - List the possible gametes that each parent produces. - Diagram and complete a Punnett Square or use Columns and Arrows to show your work. - Give the phenotype percentages/ratio of the offspring. - Express the phenotypes of the offspring with simplified ratio, fractions, and percentages. - Note that for sex-linked traits, you must report the sex as part of the phenotype. There are usually different ratios of the trait in males versus females.
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Part 2: Data Tables Table 1: Parent Genotypes: Monohybrid Crosses Table 2: Generation Data Produced by Monohybrid Crosses Part 2: Post-Lab Questions 1. How much genotypic variation do you find in the randomly picked parents of your crosses? 2. How much in the offspring? 3. Pool all of the offspring from your five replicates. How much phenotypic variation do you find? 4. Is the ratio of observed phenotypes the same as the ratio of predicted phenotypes? Why or why not? 5. What is the difference between genes and alleles? 6. How might protein synthesis execute differently if a mutation occurs?
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b. What are the genotypic ratios of the offspring from this cross? c. What are the phenotypic ratios of the offspring from this cross? 28. Now consider both hair color (B for the dominant brown allele and b for recessive blonde allele) and eye color. Having brown eyes is the dominant phenotype (allele R) and having blue eyes is the recessive phenotype (allele r). a. Assuming that these alleles sort independently, do a dihybrid cross of two parents that are heterozygous for each gene. Use the Punnett square below. b. What are the ratios for each phenotype?
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