How would you perform a reciprocal cross for the characteristic of stem height in the garden pea?

Short Answer

Expert verified

There would be two sets of P0 parents utilised. Here pollen from tall plant would be transported to the dwarf plant.

Step by step solution

01

Step. 1 Introduction

This crosses feature crossings involving the same characters however with the sexes inverted. It indicates that when in a cross, A has been used as as the female individual and B is being used as the male individual, then in the second crossing or reciprocal cross, A would be used as male individual and B will be used as the female individual.

02

Step. 2 Explanation

There would be 2 types of P0 parents utilised. With in initial cross, pollen out of a breeding tall plant will be transported to that of the stigma for a true dwarf plant. Pollen from a true dwarf plant would be transmitted here to stigma of a true tall plant in the second cross. F1 and F2 children from each cross would be studied to see whether offspring characteristics differed depending on which parent provided each trait.

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Most popular questions from this chapter

Why is it more efficient to perform a test cross with a homozygous recessive donor than a homozygous dominant donor? How could the same information still be found with a homozygous dominant donor?

Figure 12.6What are the genotypes of the individuals labeled 1, 2, and 3?

The gene for flower position in pea plants exists as axial or terminal alleles. Given that axial is dominant to terminal, list all of the possible F1 and F2 genotypes and phenotypes from a cross involving parents that are homozygous for each trait. Express genotypes with conventional genetic abbreviations.

A farmer raises black and white chickens. To his surprise, when the first generation of eggs hatch all the chickens are black with white speckles throughout their feathers. What should the farmer expect when the eggs laid after interbreeding the speckled chickens hatch?

a. All the offspring will be speckled.

b. 75% of the offspring will be speckled, and 25% will be black.

c. 50% of the offspring will be speckled, 25% will be black, and 25% will be white.

d. 50% of the offspring will be black and 50% of the offspring will be white.

The ABO blood groups in humans are expressed as the IA, IB, and i alleles. The IA allele encodes the A blood group antigen, IB encodes B, and i encodes O. Both A and B are dominant to O. If a heterozygous blood type A parent (IAi) and a heterozygous blood type B parent (IBi) mate, one-quarter of their offspring will have AB blood type (IAIB) in which both antigens are expressed equally. Therefore, ABO blood groups are an example of:

  1. multiple alleles and incomplete dominance

  2. codominance and incomplete dominance

  3. incomplete dominance only

  4. multiple alleles and codominance

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