Define/Explain: Dihybrid cross.

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(N/A) dihybrid cross is a genetic cross between two individuals that are heterozygous for two different traits. It involves the study of the inheritance patterns of two pairs of contrasting characters simultaneously. For example,crossing a plant with round and yellow seeds $(RRYY)$ with a plant having wrinkled and green seeds $(rryy)$.

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When a tall and red-flowered individual is crossed with a dwarf and white-flowered individual,the phenotype in the progeny is dwarf and white. What will be the genotype of the tall and red-flowered individual?

When a tall plant with rounded seeds $(TTRR)$ is crossed with a dwarf plant with wrinkled seeds $(ttrr)$,the ${F_1}$ generation consists of tall plants with rounded seeds. How many types of gametes will an ${F_1}$ plant produce?

How many types of gametes will be produced by the offspring resulting from the cross $AABB \times aabb$?

What is the genotypic ratio of the $F_2$ generation in Mendel's dihybrid cross?

Mrs. Verma has a pair of autosomal genes '$Bb$' and she also carries an $X$-linked gene '$dd$'. What will be the percentage of gametes that contain the genes '$bd$'?

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