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What is the genotype of pure - breed round seeds ?.
a .Rryy
b . Rr
c. Rrry
d. RR
Step by step
Solved in 4 steps
- Why plant breeders intend to change the inheritance of crop plants? How plant breeders can change the heredity of crop plants? Explain your answer in briefly.A pea plant has the genotype rrYy. How many different types ofgametes can it make and in what proportions?a. 1 rr : 1 Yyb. 1 rY : 1 ryc. 3 rY : 1 ryd. 1 RY : 1 rY : 1 Ry : 1 ryWhat are all the possible genotypes of a round, yellow pea? Select all that apply. RRyy RRYY rrYy RRYY RRYY Rryy O RrYy O rrYY
- a. 1 dominant allele will contribute 120/10 = 12 cm to the base height of the plant.b. The height of the parent plant 1 Genotype of the parent plant 1 – D1D1D2D2D3D3d4d4d5d5 The height of the parent plant 2 Genotype of the parent plant 2 – d1d1d2d2d3d3D4D4D5D5Contributing alleles – D4D4D5D5. The height of the plant without any contributing alleles would be 80 cm. The plant with genotype d1d1d2d2d3d3D4D4D5D5 has 4 contributing allele each of which contributes 12 cm to the base. Hence, the height of the plant with genotype d1d1d2d2d3d3D4D4D5D5 would be 80 + 12 + 12 + 12 + 12 = 128 cm. c. Parents – D1D1D2D2D3D3d4d4d5d5 × d1d1d2d2d3d3D4D4D5D5 Gametes – D1D2D3d4d5 × d1d2d3D4D5 F1 generation – D1d1D2d2D3d3D4d4D5d5 The height of the plants of F1 generation = 80 + 12 + 12 + 12 + 12 + 12 = 140 cm Hence, Genotype of the F1 = D1d1D2d2D3d3D4d4D5d5 Phenotype of…A cross is made between a pea plant that is RrYy and one that isrrYy. What is the predicted outcome of the seed phenotypes?a. 9 round, yellow : 3 round, green : 3 wrinkled, yellow :1 wrinkled, greenb. 3 round, yellow : 3 round, green : 1 wrinkled, yellow :1 wrinkled, green c. 3 round, yellow : 1 round, green : 3 wrinkled, yellow :1 wrinkled, greend. 1 round, yellow : 1 round, green : 1 wrinkled, yellow :1 wrinkled, greenGive at least three reasons why hybrid seeds are expensive.
- A plant bearing round seed coats is testcrossed, and half of the offspring bear round seed coats. What are the genotypes of the of the parents in the testcross? a. RR and rr b. Rr and Rr c. Rr and rr d. RR and Rr e. RR and rrWhat are the possible genotype and phenotype of offspring if one pf the parent is heterozygous tall and the other parent is homozygous short Legend T- tall pea plant t- short pea plant Question 1. What is the genotypic ratio 2. What are the possible phenotypes of the offspring? 3. What is the phenotypic ratio 4. What is the percentage of having the tall trait.In a flower, Letter P for purple is dominant over p for white. What is the phenotype of a heterozygote flower? A. PPP B. Purple C. Pp D. white
- Use the following information to answer the next question. Here are some descriptions and symbols that provide genetic information about a pea plant. 1. different form of each gene 2. RR, Rr, rr 3. Tt´ tt 4. white flower colour Match the description above with each item below. Genotype Phenotype Allele Monohybrid crossThere are 120 pink flowers and 112 white collected as a result of the Second filial generation. What are the parental genotypes of the parents? a. Red and Pink b. Pink and Pink c. Pink and White d. Red and WhiteA plant breeder wants to use selective breeding to produce corn with short stalks and a high mass of grain.He could use the following varieties of cor, A, Long stalks, high mass of grain, B, Short stalks, low mass of grain or c, Long Stalks, low mass of grain. What would the plant breeder need to do to make sure he always produced corn with a short stem and a high mass of grain? Describe three steps the breeder would use.