Biology 1408 - Exam #4
Which of the following parts of the flower produce the egg? - Answer-The carpel
In a mendelian monohybrid cross, the _______ generation is always completely heterozygous. - Answer-
F1
In which kind of cross would you expect to find a ratio of 3:1 among the F2 offspring? - Answer-
Monohybrid cross
Mendel's law of segregation implies that the two members of an allelic pair: - Answer-Are distributed to
separate gametes
What are alleles? - Answer-Alternative forms of a gene for a single trait, such as blue eyes and brown
eyes
When an organism has two identical alleles for a trait we would refer to this condition as: - Answer-
Homozygous
Which of the following terms would be used for an allele which can mask the expression of another
allele? - Answer-Dominant
If pairs of factors separate independently of other pairs of factors, you are dealing with the: - Answer-
Law of independent assortment
, A testcross occurs when an individual with the _____________ is crossed with an individual having the
_______________. - Answer-Dominant phenotype; recessive phenotype
In a recessive disorder, individuals who have that recessive gene but not the disorder are referred to as:
- Answer-Carriers
Which of the following disorders is characterized by thick, viscous mucus production in the lungs and
digestive tract? - Answer-Cystic fibrosis
Which of the following disorders is caused by individuals lacking an enzyme which is needed to break
down the amino acid phenylalanine, and if not treated with a proper diet avoiding phenylalanine, severe
mental retardation occurs? - Answer-PKU
When a trait has more than two different forms it would be best described by which of the following
terms? - Answer-Multiple alleles
If you were studying the phenomena of one gene having more than one effect, you would be studying
which of the following? - Answer-Pleiotropy
Which of the following statements is untrue about X-linked disorders? - Answer-In males, the normal Y
allele will mask the disorder X allele
When two or more sets of alleles affect the same trait, it is referred to as: - Answer-Polygenic
inheritance
When dominant alleles are both fully expressed in the phenotype, it is referred to as: - Answer-
Codominance
Which of the following is not a nucleotide found in DNA? - Answer-Uracil
Which of the following parts of the flower produce the egg? - Answer-The carpel
In a mendelian monohybrid cross, the _______ generation is always completely heterozygous. - Answer-
F1
In which kind of cross would you expect to find a ratio of 3:1 among the F2 offspring? - Answer-
Monohybrid cross
Mendel's law of segregation implies that the two members of an allelic pair: - Answer-Are distributed to
separate gametes
What are alleles? - Answer-Alternative forms of a gene for a single trait, such as blue eyes and brown
eyes
When an organism has two identical alleles for a trait we would refer to this condition as: - Answer-
Homozygous
Which of the following terms would be used for an allele which can mask the expression of another
allele? - Answer-Dominant
If pairs of factors separate independently of other pairs of factors, you are dealing with the: - Answer-
Law of independent assortment
, A testcross occurs when an individual with the _____________ is crossed with an individual having the
_______________. - Answer-Dominant phenotype; recessive phenotype
In a recessive disorder, individuals who have that recessive gene but not the disorder are referred to as:
- Answer-Carriers
Which of the following disorders is characterized by thick, viscous mucus production in the lungs and
digestive tract? - Answer-Cystic fibrosis
Which of the following disorders is caused by individuals lacking an enzyme which is needed to break
down the amino acid phenylalanine, and if not treated with a proper diet avoiding phenylalanine, severe
mental retardation occurs? - Answer-PKU
When a trait has more than two different forms it would be best described by which of the following
terms? - Answer-Multiple alleles
If you were studying the phenomena of one gene having more than one effect, you would be studying
which of the following? - Answer-Pleiotropy
Which of the following statements is untrue about X-linked disorders? - Answer-In males, the normal Y
allele will mask the disorder X allele
When two or more sets of alleles affect the same trait, it is referred to as: - Answer-Polygenic
inheritance
When dominant alleles are both fully expressed in the phenotype, it is referred to as: - Answer-
Codominance
Which of the following is not a nucleotide found in DNA? - Answer-Uracil
