| 单词 | dihybrid cross |
| 例句 | Independent assortment of genes can be illustrated by the dihybrid cross, a cross between two true-breeding parents that express different traits for two characteristics. Concepts of Biology 2013-04-25T00:00:00Z To exemplify this, imagine a dihybrid cross involving flower color and plant height in which the genes are next to each other on the chromosome. Biology for AP Courses 2022-06-09T00:00:00Z Recall the phenotypic inheritance pattern for Mendel’s dihybrid cross, which considered two non-interacting genes—9:3:3:1. Biology for AP Courses 2022-06-09T00:00:00Z Perfectly unlinked genes correspond to the frequencies predicted by Mendel to assort independently in a dihybrid cross. Biology for AP Courses 2022-06-09T00:00:00Z The independent assortment of genes can be illustrated by the dihybrid cross, a cross between two true-breeding parents that express different traits for two characteristics. Biology for AP Courses 2022-06-09T00:00:00Z If you create a Punnett square with these gametes, you will see that the classical Mendelian prediction of a 9:3:3:1 outcome of a dihybrid cross would not apply. Concepts of Biology 2013-04-25T00:00:00Z Question: What will be the offspring of a dihybrid cross? Biology for AP Courses 2022-06-09T00:00:00Z If you create the Punnett square with these gametes, you will see that the classical Mendelian prediction of a 9:3:3:1 outcome of a dihybrid cross would not apply. Biology for AP Courses 2022-06-09T00:00:00Z A dihybrid cross demonstrates independent assortment when the genes in question are on different chromosomes or distant from each other on the same chromosome. Biology for AP Courses 2022-06-09T00:00:00Z This law can be demonstrated in a dihybrid cross involving two different traits located on different chromosomes. Biology for AP Courses 2022-06-09T00:00:00Z Ignoring seed color and considering only seed texture in the above dihybrid cross, we would expect that three quarters of the F2 generation offspring would be round, and one quarter would be wrinkled. Biology for AP Courses 2022-06-09T00:00:00Z Figure 12.19 This figure shows all possible combinations of offspring resulting from a dihybrid cross of pea plants that are heterozygous for the tall/dwarf and inflated/constricted alleles. Biology for AP Courses 2022-06-09T00:00:00Z |
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