The petal color of a species of flowers is inherited along Mendelian ratios. A cross of two plants with redflowers produces 1,068 plants with red flowers and 390 plants with yellow flowers.A. Propose a model to explain the inheritance of red and yellow flowers.B. Determine the probability of producing a plant with yellow flowers when a heterozygous plant withred flowers is crossed with a homozygous plant with yellow flowers.B IU三三of 22 AnsweredtvMacBook Air吕口F3D00 F4#$&34567QWEY

Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden pea plants. Mendel presented his work in a paper entitled “Experiments in plant hybridization” at the meeting of the natural history society of Brunn. The external appearance of an individual for any trait is called the phenotype. The genotype is the genetic constitution of an individual with respect to a single or set of characters. Mendel gave various postulates regarding the inheritance of characters and these postulates later became the law of Mendel. The three laws given by Mendel are the law of dominance, the law of segregation, and the law of independent assortment.The petal color of the flower is inherited by the Mendelian ratio. A cross of two plants produces with red flowers produces 1068 plants with red flowers and 390 pants with yellow flowers. This ratio is approximately 3:1. An allele that expresses itself even in the presence of an alternative allele is known as a dominant allele. An allele that is not expressed in the presence of an alternative allele is called a recessive allele. A trait is an inherited character and its detectable variant. Mendel law of inheritance Law of dominance- It is the first law of Mendel.- It states that in a cross between two organisms that are pure for any pair of contrasting characters, the character that expresses in the first generation is dominant and the one which is suppressed is recessive. Law of segregation- It is the second law of Mendel. It states that members of allelic pairs in a hybrid remain together without mixing with each other and they segregate during gamete formation. The inheritance of the flowers can be explained by the law of dominance and the law of segregation. Since the ratio is 3:1 and both the parents have red flowers. The red color can be represented by R and is dominant over yellow which is r. Both the parents will have genotype Rr. So both the parents will have red flowers according to the law of dominance. By the law of segregation, both parents will produce two types of gametes R and r. The cross produces the offspring in the ratio 3:1 as follows. R r R RR (red) Rr (red) r Rr (red) rr (yellow)The heterozygous plant with red flowers will have genotype Rr and produce two types of gametes R and r. The homozygous pant with the yellow flower will have genotype rr ad produce one type of gamete r. The cross can be represented as below. R r r Rr (red) rr (yellow) r Rr (red) rr (yellow) The offspring have genotype Rr and rr in the ratio 1:1. The phenotype of the offspring is red and yellow in the ratio 1:1. Since out of four offspring wo have yellow flowers the probability of the heterozygous red flower plant and homozygous yellow flower plant producing a yellow flower plant is 50%.