a) Mention whether the given cross is monohybrid/ dihybrid. b) Mention the phenotype of the parents. c) Which theory of Mendel is being prooved by the given cross? d) Write the phenotypic ratio of the F2 generation.
Answers
Answer:
Explanation:
a)A monohybrid cross is a cross between two organisms with different variations at one genetic chromosome of interest.[1][2] The character(s) being studied in a monohybrid cross are governed by two or multiple variations for a single locus. To carry out such a cross, each parent is chosen to be homozygous or true breeding for a given trait (locus). When a cross satisfies the conditions for a monohybrid cross, it is usually detected by a characteristic distribution of second-generation (F2) offspring that is sometimes called the monohybrid ratio.
B)In other cases, each parent provides a different allele of a given gene, and the offspring is referred to as heterozygous ("hetero" meaning "different") for that allele. Alleles produce phenotypes (or physical versions of a trait) that are either dominant or recessive.
C)From this simple observation, Mendel proposed his first principle, the principle of uniformity; this principle states that all the progeny of a cross like this (where the parents differ by only one trait) will appear identical
D)In F2 generation, tall red, tall white, dwarf red and dwarf white will be in the ratio of 9:3:3:1. Thus F2 phenotypic ratio is 9:3:3:1