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9. List the four possible combinations of alleles this onion could contribute: 10. If the other parent was also heterozygous for both traits they would have the same four possible combinations of alleles. List them below: Now let's work on the Punnett square. A Punnett square depicting this dihybrid cross always has 16 squares; if each parent can contribute four different possible combinations of alleles, there are 16 possible combinations once crossed. 11. Use the four possible combinations of alleles from each onion for color and taste to fill in the Punnett square below. This will illustrate a true dihybrid cross showing the Mendelian pheno- typic ratio of 9:3:3:1.

9. List the four possible combinations of alleles this onion could contribute: 10. If the other parent was also heterozygous for both traits they would have the same four possible combinations of alleles. List them below: Now let's work on the Punnett square. A Punnett square depicting this dihybrid cross always has 16 squares; if each parent can contribute four different possible combinations of alleles, there are 16 possible combinations once crossed. 11. Use the four possible combinations of alleles from each onion for color and taste to fill in the Punnett square below. This will illustrate a true dihybrid cross showing the Mendelian pheno- typic ratio of 9:3:3:1.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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I did the punnet square for Rr and Bb but I’m confused on dihybrid crosses.
LAB 11 I Genetics Part 3. Now that you can easily do a Punnett square for a monohybrid cross, let's go on to dihybrid crosses. A dihybrid cross looks at two characteristics instead of one. For instance, we can look at the cross between a parent who has red skin and sweet taste with a parent who has white skin and bitter taste. The trick is to make sure you list every possible combination of alleles each parent can donate. There are several ways to determine these combinations, One way is to "foil it out" (as you would in algebra). Given the following information, try to work it out: Onion skin color is denoted by the letter "R" with red (R) allele being dominant and white (r) allele being recessive. Taste we already denoted by the letter "B"; again, sweet (B) is dominant and bitter (b) is recessive. If one parent is heterozygous for skin color (red) and heterozygous dominant for taste (sweet), the onion genotype would be RrBb. To figure out the four possible combinations of alleles the parent onion could donate, you could do this: first last RrBb outside inside 9. List the four possible combinations of alleles this onion could contribute: 10. If the other parent was also heterozygous for both traits they would have the same four possible combinations of alleles. List them below: Now let's work on the Punnett square. A Punnett square depicting this dihybrid cross always has 16 squares; if each parent can contribute four different possible combinations of alleles, there are 16 possible combinations once crossed. 11. Use the four possible combinations of alleles from each onion for color and taste to fill in the Punnett square below. This will illustrate a true dihybrid cross showing the Mendelian pheno- typic ratio of 9:3:3:1. 104
Transcribed Image Text:LAB 11 I Genetics Part 3. Now that you can easily do a Punnett square for a monohybrid cross, let's go on to dihybrid crosses. A dihybrid cross looks at two characteristics instead of one. For instance, we can look at the cross between a parent who has red skin and sweet taste with a parent who has white skin and bitter taste. The trick is to make sure you list every possible combination of alleles each parent can donate. There are several ways to determine these combinations, One way is to "foil it out" (as you would in algebra). Given the following information, try to work it out: Onion skin color is denoted by the letter "R" with red (R) allele being dominant and white (r) allele being recessive. Taste we already denoted by the letter "B"; again, sweet (B) is dominant and bitter (b) is recessive. If one parent is heterozygous for skin color (red) and heterozygous dominant for taste (sweet), the onion genotype would be RrBb. To figure out the four possible combinations of alleles the parent onion could donate, you could do this: first last RrBb outside inside 9. List the four possible combinations of alleles this onion could contribute: 10. If the other parent was also heterozygous for both traits they would have the same four possible combinations of alleles. List them below: Now let's work on the Punnett square. A Punnett square depicting this dihybrid cross always has 16 squares; if each parent can contribute four different possible combinations of alleles, there are 16 possible combinations once crossed. 11. Use the four possible combinations of alleles from each onion for color and taste to fill in the Punnett square below. This will illustrate a true dihybrid cross showing the Mendelian pheno- typic ratio of 9:3:3:1. 104
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