Chapter 4, Problem 55P

a.

Summary Introduction

To determine: The appearance of the F1.

Introduction: Dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome.

b.

Summary Introduction

To determine: The chromosomes 1 and 2 of the parents and the F1 and the arrangement of the alleles

Introduction: Autosomal dominant phenotypes are slightly less severe and demonstrate widely variable expressivity and incomplete penetrances.

c.

Summary Introduction

To determine: The proportion of the progeny that will have all four recessive phenotypes.

Introduction: The phenomenon of dominance in a recessive allele remains obscure in the hybrid.