These factors occur in pairs except in gametes where

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These factors: occur in pairs, except in gametes where there is only one from each pair ° ° Two purple flowered pea plants are crossed and the offspring include both purple and white flowered plants. What are the genotypes of the parents? (clicker)
Both heterozygous ° ° Test Cross (figure 14.7) Cross an individual of unknown genotype with a homozygous recessive individual Which phenotype are we not sure of the genotype? o Dominant ° ° If the unknown individual is homozygous dominant P P/P x p/p Gametes P p Offspring P/p All purple ° If the unknown individual is heterozygous P P/p x p/p Gametes P,p p Offspring P/p p/p (punnett square) Purple white ° ° Dihybrid Cross : seed form and seed color (notebook) P round, yellow wrinkled, green F1 all round yellow
F2 round yellow 315 Wrinkled yellow 101 Round green 108 Wrinkled green 32 P phenotype round yellow x wrinkled green Genotype R/R Y/Y r/r y/y Gametes R/Y r/y F1 genotype R/r Y/y Phenotype all round yellow seed Gametes R/Y, R/y, r/Y, r/y (punnett square in notebook) -result of independent assortment ° Observations New non-parental combinations 3:1 ratio for each trait conclusions: o this results from two separate and independent monohybrid crosses ° ° An individual with the genotype (A/a B/b C/C D/d) cannot produce which of the following gametes? (clicker) A/b/c/d °
° An individual is heterozygous for 4 genes, eye, ear, nose and throat. Eye and ear are linked and present on chromosome 11. Nose and throat are linked in chromosome 16. Given that a child of this individual inherits eh eye1 allele, what is the change that they will also inherit the eye2 allele from the same parent? (clicker) (chromosomes in notebook) 0% only get one allele from each parent ° ° Linked Genes 14.8 Genes that are one the same chromosome o They do not assort independently (see gamete formation rules) ° Dihybrid cross (assuming linked genes)- notebook Reduces variation in offspring Takes out non parental P phenotype Round yellow x wrinkled green Genotype RY/RY ry/ry Gametes RY F1 genotype RY/ry Phenotype all round yellow seeded Gametes RY or ry F2 (punnett square in notebook) 3:1 ratio Given that a child of this individual inherits the eye1 allele, what is the chance that they will also inherit the throat8 allele from the same parent? (clicker) 50%.. or less? ry

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