what is monohybrid and dihybrid cross ? give one example for each why did mendel pea plant for his experiments
Answers
ANSWER:A monohybrid cross is defined as the cross happening in the F1 generation offspring of parents differing in one trait only. A dihybrid cross is a cross happens F1 generation offspring of differing in two traits.
EXPLANATION:
a) Reason for the selection of pea plants for the genetic experiments
a) Reason for the selection of pea plants for the genetic experimentsThe reason for the selection of pea plants for the genetic experiments are
a) Reason for the selection of pea plants for the genetic experimentsThe reason for the selection of pea plants for the genetic experiments areEasy to grow in the garden.The flowers of pea plants are hermaphrodite, i.e flowers have bisexual characteristics.Easy to obtain pure breed plant through self-fertilizationThe generation time of pea plants is less.
a) Reason for the selection of pea plants for the genetic experimentsThe reason for the selection of pea plants for the genetic experiments areEasy to grow in the garden.The flowers of pea plants are hermaphrodite, i.e flowers have bisexual characteristics.Easy to obtain pure breed plant through self-fertilizationThe generation time of pea plants is less.They have excellent disease resistance and have an optimal rate of survival
Answer:
A Monohybrid cross is a type of genetic cross between two individuals with homozygous genotypes of a single character or trait, often resulting in an opposite phenotype.
Examples of Monohybrid Cross
Mendel’s Peas
1.George Mendel used the monohybrid cross to determine the dominant and recessive traits in the case of peas.
2.An example of such experiments is the length of the plant. Some peas are taller while the others are shorter.
3.The homozygous allele for the tall pea plant is represented by TT, and the homozygous allele for the short/dwarf pea plant is represented by tt.
4.A monohybrid cross between the two plants results in the production of heterozygous genotype (Tt).In terms of phenotype, the hybrids are long pea plants, thus indicating that the tall trait is the dominant trait and the short trait is a recessive trait.
A dihybrid cross is a type of genetic cross between two individuals with either homozygous or heterozygous genotypes of two characters or traits.
Examples of Dihybrid Cross
Dihybrid cross in Pea plants
1.An example of a dihybrid cross is the cross between a homozygous pea plant with round yellow seeds and wrinkled green seeds.
2.The round yellow seeds are represented by RRYY alleles, whereas the wrinkled green seeds are represented by rryy. The gametes formed from these alleles are RY and ry.
3.When the two parents are crossed, the F1 hybrids with the RrYy allele are formed. The hybrids contain round yellow seeds (RrYy) with the dominant R allele for roundness and the dominant Y allele for the yellow color.
4.The four alleles can combine in four different combinations; RY, Ry, rY, and ry. the four alleles are assorted randomly to produce four types of gametes.
5.The gametes unit at random during fertilization to produce sixteen types of individuals in the F2 generation.
6.The hybrids occur in the ratio of 9 round yellow, 3 round green, 3 wrinkled yellow, and 1 wrinkled green.
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