When cross-1 is done between white mutant A and white mutant B, the resulting F1 progeny is wild type (Purple). Analyze the results obtained from self-fertilization between F1 progeny and determine phenotypic ratio and phenotypic distribution among F2 progeny. Introduction: The condition mentioned above can be answered with the help of complementation test. Complementation test is performed in such a situation as it helps us understand whether the mutation that has occurred is cis mutation (mutation in same gene) or trans mutation (mutation in different set of gene). Complementation occurs when the progeny with normal (wild type) phenotype is observed from crossing between two organisms with different homozygous recessive mutation. On the other hand, complementation is not observed when mutation is in the same gene. Mendel's second law is the law of independent assortment. According to this law, when cross is done for more than one trait (two or more), the traits organize independently (selection of one trait is not dependent on another), so different phenotypes may occur with equal probability.

Question

Want to see the full answer?

Answer 1

Question

Chapter 4, Problem 35P

Summary Introduction

To analyze:

When cross-1 is done between white mutant A and white mutant B, the resulting F1 progeny is wild type (Purple). Analyze the results obtained from self-fertilization between F1 progeny and determine phenotypic ratio and phenotypic distribution among F2 progeny.

Introduction:

The condition mentioned above can be answered with the help of complementation test. Complementation test is performed in such a situation as it helps us understand whether the mutation that has occurred is cis mutation (mutation in same gene) or trans mutation (mutation in different set of gene). Complementation occurs when the progeny with normal (wild type) phenotype is observed from crossing between two organisms with different homozygous recessive mutation. On the other hand, complementation is not observed when mutation is in the same gene.

Mendel's second law is the law of independent assortment. According to this law, when cross is done for more than one trait (two or more), the traits organize independently (selection of one trait is not dependent on another), so different phenotypes may occur with equal probability.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Three autosomal recessive mutations in yeast, all producing the same phenotype (m1, m2, and m3), are subjected to complementation analysis. Of the results shown below, which, if any, are alleles of one another? Predict the results of the cross that is not shown—that is, m2 * m3. Cross 1: m1 * m24 F1: all wild-type progeny Cross 2: m1 * m34 F1: all mutant progeny

In corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of corn plants (i.e. the tassel) unable to produce fertile pollen; the female parts, however, remain receptive to pollination by pollen from male-fertile corn plants. However, the presence of a nuclear fertility restorer gene F restores fertility to male-sterile lines. Using the following color-coded circles, simulate the crosses indicated below. Put the illustrations of crosses in the spaces provided. Be sure to include in the labels the genotypes and phenotypes of the offspring in each cross. Big light green circle - male-sterile cytoplasm Big orange circle - male-fertile cytoplasm Small orange circle - FF nucleus Small half-light green-half-orange circle - Ff nucleus Small light-green circle - ff nucleus

In autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is very near the centromere of the chromosome carrying it. The allele G for green stigma is dominant to g for red stigmas. A homozygous green autotetraploid strain is crossed with a homozygous red autotetraploid strain. Each of the F1 GGgg plants would obtain 12 gametes which are 2GG, 8Gg, and 2g. How were these obtained?