Exam 13: Observing Patterns in Inherited Traits

Heritable units of information about traits are called __________.

In mice,the allele for colored fur (C)is dominant to the allele for albinism (c).The allele for normal behavior (W)is dominant to that for waltzing movement (w).Give the probable genotypes of the parents if a colored normal crossed with a white waltzer produced 10 colored normal,8 colored waltzers,2 white waltzers,and 11 white normal.  

Environmental effects can cause the following responses except  

Height,weight,and eye color are examples of phenotypes that illustrate  

Figure 13.11 -The F2 phenotypic ratio of 9:3:4,as shown above,is a result of a cross involving  

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 1/4 tall purple,1/4 tall white,1/4 dwarf purple,and 1/4 dwarf white.What is the genotype of the parents?  

The process of cell division called ___________assorts gene pairs of homologous chromosomes independently of gene pairs on all other chromosomes.

Various forms that a single gene can take at a given locus are called  

A hybrid with two nonidentical alleles (Aa)expresses a phenotype that is between the dominant and recessive forms.This type of inheritance pattern is called _________

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 dominant for one gene and heterozygous for the other (AA Bb),how many unique genotypes potentially will be present in their offspring?

Which eye color has dense melanin deposits in the iris?  

In tomatoes,red (R)is dominant to yellow (r),tall (D)is dominant to dwarf (d),and smooth (H)is dominant to hairy (h).How many possible different phenotypes are there in relationship to these three characteristics?  

According to Mendel,if a male that is homozygous for the dominant form (PP)of a trait is crossed with a female that is homozygous for the recessive (pp)form of a trait,all offspring will show the ____ form of the trait.  

Stress-induced depression has been found to be a result of which of the following?  

If black fur color is controlled by a dominant allele (B)and brown by its recessive allele (b),give the genotypes of the parents if a black male crossed with a brown female and produces 1/2 black offspring and 1/2 brown offspring.  

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 purple flowers produces 3/4 tall purple and 1/4 tall white.What is the genotype of the parents?  

In sweet peas,dominant alleles C and P are necessary for colored flowers.In the absence of either (__ pp or cc __)or both (cc pp),the flowers are white.A cross between a plant with colored flowers and a plant with white flowers that produced 38 plants with colored flowers and 42 plants with white flowers could be written as _______.

White fruit color in summer squash is influenced by a dominant allele W,whereas colored fruit must be ww.In the presence of ww,a dominant gene G results in yellow fruit,and homozygous gg results in green fruit.The F2 phenotypic ratios resulting from a cross of a true-breeding plant with white fruit (genotype WW GG)with a plant with green fruit will result in which phenotypic ratios?  

A pure-breeding population of a __________ trait is easier to establish from a mixed population.

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 a double homozygous recessive (aa bb),how many unique phenotypes potentially will be present in their offspring?