Exam 13: Observing Patterns in Inherited Traits

In garden peas,one pair of alleles controls the height of the plant,and a second pair of alleles controls flower color.The allele for tall (D)is dominant to the allele for dwarf (d),and the allele for purple (P)is dominant to the allele for white (p).A tall plant with purple flowers crossed with a tall plant with white flowers produces 3/8 tall purple,1/8 tall white,3/8 dwarf purple,and 1/8 dwarf white.What is the genotype of the parents?  

In garden peas,one pair of alleles controls the height of the plant,and a second pair of alleles controls flower color.The allele for tall (D)is dominant to the allele for dwarf (d),and the allele for purple (P)is dominant to the allele for white (p).A tall plant with purple flowers crossed with a dwarf plant with white flowers produces 1/2 tall with purple flowers and 1/2 tall with white flowers.What is the genotype of the parents?  

A cross between two individuals identically heterozygous for one gene is called ______.  

In ____,a pair of nonidentical alleles affecting the phenotypes of a given trait are both expressed at the same time in heterozygotes.  

Answer the following questions using the group of answers below. -In a dihybrid cross between a parent that is a double heterozygote (Aa Bb)and a parent that is homozygous recessive for one gene and heterozygous for the other (aa Bb),how many unique phenotypes potentially will be present in their offspring?

All of the following pea plant feature were favorable to the success of Mendel's experiments,except  

In Labrador retrievers,coat color is governed by two different genes-TYRP1 controls the amount of brown pigment,while MC1R alleles control the color.This type of inheritance is called____.  

In horses,black coat color is influenced by the dominant allele (B),and chestnut coat color by the recessive allele (b).Trotting gait is due to a dominant gene (T),pacing gait to the recessive allele (t).Give the phenotype and genotype of the horse you would use in a testcross to determine the genotype of a black trotter.  

In garden peas,one pair of alleles controls the height of the plant,and a second pair of alleles controls flower color.The allele for tall (D)is dominant to the allele for dwarf (d),and the allele for purple (P)is dominant to the allele for white (p).A tall plant with purple flowers crossed with a dwarf plant with white flowers produces 1/4 tall purple,1/4 tall white,1/4 dwarf purple,and 1/4 dwarf white.What is the genotype of the parents?  

In garden peas,one pair of alleles controls the height of the plant,and a second pair of alleles controls flower color.The allele for tall (D)is dominant to the allele for dwarf (d),and the allele for purple (P)is dominant to the allele for white (p).A tall plant with white flowers crossed with a dwarf plant with purple flowers produces all tall offspring with purple flowers.What is the genotype of the parents?  

There are three alleles controlling the ABO blood types.IA and IB are codominant genes so that the combination IAIB produces the AB blood type.The third allele,i,is recessive to the other two alleles.Which of the following combinations of parents (with blood types on the left)and child (with blood type listed on the right)is NOT possible?  

Pleiotropic genes ____.  

Which of the following describes changes to the genetic material,but not the genetic sequence,that can be passed on to the next generation?  

What is a method of determining the genotype of an individual with a dominant phenotype?  

Answer the following questions using the group of answers below. -Plant species X is diploid (2n = 24)and has a quantitative trait,the expression of which is controlled by gene loci on each of its chromosomes.What is the maximum number of alleles for this trait that any one individual of species X could have?