Help with some homework questions please? (show work if you could) 1. A heterozy
ID: 187788 • Letter: H
Question
Help with some homework questions please? (show work if you could)
1. A heterozygous pea plant that is tall with yellow seeds, TtYy, is allowed to self-fertilize. What is the probability than an offspring will be either tall with green seeds or dwarf with yellow seeds? 2. A dihybrid cross between two red-flowered & tall plants, RrTt, produces 365 red and tall, 95 red and short, 101 white and tall, 25 white and short offspring. Use the chi- square test to determine if these satisfy the Mendelian ratios expected for this type of cross 3. A recessive allele in mice produces offspring that are primarily yellow in color. Unfortunately, there are other complications during gestation and not all embryos survive to birth. A breeder has a large population of heterozygous mice she breeds together and gets 138 tan (normal) mice and 19 yellow ones. What percentage of homozygous mice died before they were born?Explanation / Answer
1) Tall plant - TT.
Dwarf plant - tt.
Yellow seeds plant - YY.
Green seeds plant - yy
Dwarf with green seeds plant - ttyy.
Tall with yellow seeds plant - TtYy.
Self crossed occurs, then TtYy X TtYy.
Gametes formed TY, Ty, tY and ty TY, Ty, tY and ty
Next generation
Toatal number of offsprings - 16.
Tall with yellow seeds plant - 9.
Tall with green seeds plant - 3.
Dwarf with yellow seeds plant - 3.
Dwarf with green seeds plant - 1.
The probability of tall with green seeds plant = 3/16 = 0.187 = 18.7%.
The probability of dwarf with yellow seeds plant = 3/16 = 0.187 = 18.7%.
Male/ Female TY Ty tY ty TY TTYY(Tall with yellow seeds plant) TTYy(Tall with yellow seeds plant) TtYY(Tall with yellow seeds plant) TtYy(Tall with yellow seeds plant) Ty TTYy(Tall with yellow seeds plant) TTyy(Tall with green seeds plant) TtYy(Tall with yellow seeds plant) Ttyy(Tall with green seeds plant) tY TtYY(Tall with yellow seeds plant) TtYy(Tall with yellow seeds plant) ttYY(Dwarf with yellow seeds plant) ttYy(Dwarf with yellow seeds plant) ty TtYy(Tall with yellow seeds plant) Ttyy(Tall with green seeds plant) ttYy(Dwarf with yellow seeds plant) ttyy(Dwarf with green seeds plant)Related Questions
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