Multiple+Choice+Questions+on+Presentation+EAT


 * **B)** alleles ||

=Question 2= People who appear normal but can pass on an allele for a genetic disorder are called.


 * || **D)** carriers ||

=Question 3= Genotype refers to an individual's:


 * || **B)** genes. ||

=Question 4= If a person has both alleles for the dominant trait, his genotype is represented as:


 * || **A)** 2 capital letters. ||

=Question 5= A heterozygous genotype is represented by:


 * || **B)** 1 capital letter and 1 lowercase letter. ||

=Question 6= Which of the following is not one of the 3 possible zygotes involving height?


 * || **C)** Ts ||

=Question 7= Since homologous chromosomes are separated during meiosis, the gametes will have copy/copies of each allele.


 * || **A)** 1 ||

=Question 8= Given a genotype of T T, what are the possible gametes?


 * || **A)** all are T ||

=Question 9= Given the following notation - Ff. This represents:


 * || **B)** a genotype ||

=Question 10= Set up a Punnett square of your choice of alleles. Example, cross a heterozygous tall pea plant with a homozygous dominant tall pea plant. A phenotype ratio of _ __is expected if a heterozygous genotype is crossed with a homozygous dominant genotype.__


 * || **D)** 3:1 ||

=Question 11= Set up a Punnett square A heterozygous brown bull mates with a white cow. (Brown is the dominant trait). What are the expected phenotype ratios?


 * || **C)** 50% brown and 50 % white ||

=Question 12= A rough coat of a guinea pig is dominant over a smooth coat. If 100% of the offspring are smooth coated, what are the genotypes and phenotypes of the parents?


 * || **C)** Both parents are rr - homozygous recessive smooth ||

=Question 13= Set up a Punnett square Two heterozygous tall pea plants are cross-pollinated. What are the phenotype ratios of the offspring?


 * || **B)** 75% tall and 25% short (3:1) ||

=Question 14= In reference to the previous question, what are the expected genotypes of the offspring?


 * || **A)** 25% TT, 50% Tt, 25% tt (1:2:1) ||

=Question 15= An autosomal recessive disorder that usually occurs among Jewish people, where they lack the enzyme Hex A is called:


 * || **B)** Tay-Sachs disease ||

=Question 16= Cystic fibrosis is due to the failure of to pass through the plasma membrane which prevents sodium and water from passing through also.


 * || **A)** chloride ions ||

=Question 17= An autosomal recessive disorder that affects nervous system development due to the lack of the enzyme needed for normal metabolism of phenylalanine is:


 * || **D)** PKU (phenylketonuria) ||

=Question 18= An autosomal dominant disorder that causes a defect in an elastic tissue protein called fibrillin is:


 * || **B)** Marfan syndrome. ||

=Question 19= Huntington disease is caused by a mutated protein called huntingtin that causes:


 * || **D)** All of the above are correct. ||

=Question 20= Traits that involve more than 1 set of alleles are called _.


 * || **D)** polygenic ||

=Question 21= The crossing of a red 4 o'clock flower and a white 4 o'clock flower results in pink flowers. This is an example of:


 * || **C)** incomplete dominance ||

=Question 22= __occurs when alleles are equally expressed in the heterozygote.__


 * || **A)** Co-dominance ||

=Question 23= Human blood type is determined from having 2 of __alleles.__


 * || **B)** 3 ||

=Question 24= ABO alleles determine the presence or absence of __on the red blood cells.__


 * || **D)** ions ||

=Question 25= The following blood types are possible if parents have genotypes AO and BO.


 * || **D)** All of these are correct. ||

=Question 26= A sex-linked trait is normally passed by the __to__ __.__


 * || **C)** mother to son ||

=Question 27= Duchenne muscular dystrophy is an X-linked recessive disorder caused by the lack of dystrophin which causes __to leak into muscles cells which then dissolve to be replaced by fibrous connective tissue.__


 * || **D)** calcium ||

=Question 28= _ is called the bleeder's disease because the affected person's blood does not clot or clots very slowly.


 * || **A)** Hemophilia ||

=Question 29= Which of the following is NOT an X-linked recessive disorder?


 * || **C)** Huntington disease ||