Exam 14: Chromosomes and Human Inheritance

Answer the following questions in reference to the five items listed below. -How many chromosomes are present in the somatic cells of a child born with Down syndrome (trisomy 21)?

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement. -A small region of a protein from three species is sequenced and found to be as follows: species X is alanine,glycine,threonine,alanine species Y is alanine,glycine,threonine,alanine species Z is alanine,valine,glycine,threonine,alanine The difference in the amino acid sequence of species Z is most likely due to this.

Choose the most appropriate answer for each. -monosomy

A woman heterozygous for color blindness (an X-linked recessive allele)marries a man with normal color vision.What is the probability that their first child (male or female)will be color blind?  

Choose the most appropriate answer for each. -deletion

Choose the most appropriate answer for each. -duplication

Some autosomal dominant diseases do not run in the family because they are lethal before the affected individual can __________.

It is now possible to analyze the genetics of an in vitro fertilized embryo by  

Polyploidy can be described as ____.  

Red-green color blindness is an X-linked recessive trait (dominant allele denoted as C).Two normal-vision parents have a color-blind son.The genotypes of the father,mother,and son are respectively _____,_____,_____.

Amniocentesis is _____.  

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement. -The nucleotide sequences of homologous regions of DNA of two species are AATGCCCCGTTA and AATGCCCCGCTTA.If this is not the result of a nucleotide base-pair addition,then it is most likely the result of this.

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is ____.  

Choose the most appropriate answer for each. -trisomy

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement. -A small region of a protein from three species is sequenced and found to be as follows: species X is alanine,glycine,glycine,threonine,alanine species Y is alanine,glycine,threonine,alanine species Z is alanine,glycine,glycine,threonine,alanine The difference in the amino acid sequence of species Y is most likely due to this.

A father who has red-green color blindness and a mother who has normal vision may have the following child:  

Changes in chromosome number are usually the result of  

Excerpt from Figure 14.8 -The accompanying figure represents which chromosomal change?  

Answer the following questions in reference to the five items listed below. -The normal sperm cell of species X carries 11 chromosomes.Following nondisjunction in the formation of secondary spermatocytes and their subsequent fertilization of normal ova,some of the zygotes will have 21 chromosomes,and the remainder will have how many chromosomes?

Select the best process listed below for each of the following statements. Note that you need to know that the sequence of amino acids directly reflects the sequence of genes that coded for their placement. -Homologous sets of genes ABCDEF and aBCdEF are located on nonhomologous chromosomes.Crossing over between them is suppressed because their locations are the result of this.