Exam 9: Patterns Of Inheritance

In Siamese cats,enzymes that code for dark fur color are only active in cooler temperatures.Thus,the tips of a Siamese cat's ears,feet,and tail are dark but not the warmer regions of its body core.This is an example of ____.

The mutation that causes the lighter skin color of all people of European descent was the result of a ____ in the gene for a melanin transport protein.

Match the following terms to the condition with which they best correspond. -height in humans

The process by which chromosomes fail to separate during meiosis is called ____.

For this problem,you may want to create a Punnett Square on a separate piece of paper.Manuel has both cystic fibrosis,a recessive disorder,and sickle cell anemia which is also a recessive disorder.Manuel's partner,Lucretia,is normal for both conditions.What is the probability that Manuel and Lucretia will have a normal child without either of the conditions Manuel has?  

An allele is ____ if its effect masks that of a ____ allele paired with it.

  Purple flower (A)is dominant over white flower (a),and tall stem (B)is dominant over short stem (b).The Punnett square represents a cross between two dihybrids (AaBb ´ AaBb).In the figure above,what would be the genotype of plant #9?

Match the following terms to the description with which they best correspond. -a range of small differences in a shared trait

In a person with cystic fibrosis,the CFTR mutation causes the protein to be ____.

A(n)____ is an offspring of a cross between two individuals that breed true for different forms of a given trait.

The ease of detecting and treating ____ is a good example of the advantages of genetic screening.

In the Bombay phenotype,a gene in the recessive condition blocks the expression of A and B red blood cell antigens.Thus,all A,B,and AB genotypes are expressed as the O phenotype.This is an example of ____.

Suppose a single nondisjunction event occurs during anaphase II of meiosis in a normal male cell from meiosis I.Of the resulting sperm,____.

Match the following terms to the description with which they best correspond. -a chromosome abnormality in which there are too many or too few copies of a particular chromosome

When Gregor Mendel first started his genetics experiments,he ____.

The failure of which organ affected by a defective CFTR protein is likely to cause death in cystic fibrosis patients?  

  Purple flower (A)is dominant over white flower (a),and tall stem (B)is dominant over short stem (b).The Punnett square represents a cross between two dihybrids (AaBb ´ AaBb).In the figure above,how many plants would have the genotype AaBb?

Match the following terms to the description with which they best correspond. -refers to a gene whose product influences multiple genes

If tall (D)is dominant to dwarf (d),and two homozygous varieties DD and dd are crossed,the progeny produced will be____.

Six fingers on one hand would be classified as a(n)____.