Define the following terms :
a. Dihybrid cross b. Homozygous
c. Heterozygous d. Test cross
Answers
Dihybrid cross is a cross between two different lines/genes that differ in two observed traits. According to Mendel's statement, between the alleles of both these loci there is a relationship of completely dominant - recessive traits.
Homozygous is a word that refers to a particular gene that has identical alleles on both homologous chromosomes. It is referred to by two capital letters (XX) for a dominant trait, and two lowercase letters (xx) for a recessive trait.
In diploid organisms, heterozygous refers to an individual having two different alleles for a specific trait. An allele is a version of a gene or specific DNA sequence on a chromosome. ... A heterozygous plant would contain the following alleles for seed shape: (Rr).
In genetics, a test cross, first introduced by Gregor Mendel, involves the breeding of an individual with a phenotypically recessive individual, in order to determine the zygosity of the former by analyzing proportions of offspring phenotypes. Zygosity can either be heterozygous or homozygous.
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