In plant, tall phenotype is dominant over dwarf phenotype, and the alleles aredesignated as T and t, respectively. Upon crossing one tall and one dwarf plant, total 250plants were obtained, out of which 124 displayed tall phenotype and rest were dwarf.Thus, the genotype of the parent plants were(a) TTX TT (b) TTx tt (c) Ttx Tt (d) Ttxt
Question
In plant, tall phenotype is dominant over dwarf phenotype, and the alleles aredesignated as T and t, respectively. Upon crossing one tall and one dwarf plant, total 250plants were obtained, out of which 124 displayed tall phenotype and rest were dwarf.Thus, the genotype of the parent plants were(a) TTX TT (b) TTx tt (c) Ttx Tt (d) Ttxt
Solution
The question is about Mendelian genetics, specifically about the inheritance of dominant and recessive traits.
Step 1: Understand the problem The problem states that in a certain plant species, the tall phenotype is dominant (T) and the dwarf phenotype is recessive (t). A cross was made between a tall and a dwarf plant, resulting in 250 offspring, 124 of which were tall and the rest were dwarf. We are asked to determine the genotype of the parent plants.
Step 2: Analyze the information In Mendelian genetics, a dominant trait will express itself when at least one dominant allele is present. A recessive trait will only express itself when both alleles are recessive.
Step 3: Apply the information Given that both tall and dwarf phenotypes appeared in the offspring, we can infer that the tall parent plant must have been heterozygous (Tt), carrying both the dominant and recessive alleles. This is because if it were homozygous dominant (TT), all offspring would be tall, which is not the case. The dwarf parent plant, showing the recessive trait, must be homozygous recessive (tt).
Step 4: Conclusion Therefore, the genotype of the parent plants were Tt (tall) and tt (dwarf), which corresponds to option (b) TTx tt.
Similar Questions
A cross between tall plant (TT) and short pea plant (tt) is inherited in progeny that was all tall plants because _______Tallness is the dominant characterShortness is the dominant characterTallness is a recessive traitHeight of pea plant is not governed by gene T or t
ne of the traits that Mendel studied in pea plants is plant height. Tall plants are dominant with respect to dwarf plants. If the gene for this trait is denoted by the letter T, then the genotype of a dwarf pea plant is
T = tall and t = shortA homozygous dominant tall pea plant is crossed with a heterozygous pea plant. This cross would result in the following phenotype(s) of the offspring: Group of answer choices100% tall100% short75% tall and 25% short50% tall and 50% short
In the garden peas of one pair of alleles controls the height of theplant and a second pair of alleles controls flower colour. Theallele for tall (T) is dominant to the allele for dwarf (t) and theallele for purple flower colour (P) is dominant to the allele forwhite (p).a. A tall plant with purple flowers crossed with a dwarf plant withwhite flowers produced 50% tall, purple and 50% tall, whiteprogeny. What is the genotype of the parents?b. A tall plant with white flowers crossed with a dwarf plant withpurple flowers produced 25% tall purple, 25% tall white, 25%dwarf purple and 25% dwarf white individuals. What is thegenotype of the parents?
The height of pea plants is controlled by a single gene with two alleles: a dominant tall allele (T) and a recessive short allele (t). Which of the following is the genotype of a homozygous dominant pea plant?TtttTXTT 4
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.