ANFS 300 EXAM 1 QUESTIONS WITH VERIFIED
ANSWERS
Mendel's first law states that:
A. All mating must be random to study inheritance patterns in peas.
B. Multiple alleles of a gene must be present in each individual.
C. Alleles of a gene separate during gamete formation.
D. Alleles are alternative forms of a gene present in a population.
E. Formative patterns of inheritance exist only for plants and animals. - Answers - C
Mendel's second law asserts that:
A. All lethal genes assort independently during gamete formation.
B. Gamete formation yields only recessive and dominant alleles.
C. Gamete pairs are segregated during meiosis I, not meiosis II.
D. Different gene pairs assort independently during gamete formation.
E. All linked genes must recombine during gamete formation. - Answers - D
The material responsible for conveying genetic information between mammalian
generations is:
A. Protein
B. Lipid
C. Deoxyribonucleic Acid
D. Carboproteins
E. Ribonucleic Acid - Answers - C
A fundamental principal of Mendel's model of inheritance is:
A. The environment does not impose selection for traits.
B. Genes linked to disease exist in populations.
C. Genes can only be studied in non-random breeding populations.
D. Genes inherited from parents control the phenotype of the progeny.
E. Selection is only imposed on deleterious traits. - Answers - D
. You perform the following cross with a new species of frogs
A/a; B/b X A/a; B/b
Where A == green ; a == red skin and B == long claws b == short claws
The following progeny were obtained:
Green skin; long claws 270
Green skin; short claws 90
Red Skin; long claws 90
Red Skin; short claws 0
These results are consistent with:
, A. Sex linked genes with increased homozygous viability.
B. Two unlinked genes ; double recessive homozygote is lethal.
C. One linked gene; double recessive homozygote is lethal.
D. Two non-recombining genes ; double recessive introgression.
E. Continuous traits homozygosing over multiple generations. - Answers - B
. The pseudoautosomal region of sex chromosomes
A. Allows sex chromosomes to behave as homologs during meiosis and mitosis.
B. Is only found in species where the homogametic sex is male
C. Are always inactivated regardless of whether the X chromosome is in a male or a
female.
D. Balance all autosomes during mitochondrial duplication.
E. Causes chromosomes to be ejected from the nucleus. - Answers - A
. Evidence that cells can count the number of X chromosomes they contain is provided
by
A. The ability of human males with a normal karyotype to inactivate their X
chromosome.
B. The observation that Barr bodies are found associated with mitochondrial DNA.
C. Kleinfelter's syndrome males, where one of the two X chromosomes is inactivated.
D. Inactivation of the Y chromosome in XXY human females.
E. Regional inactivation of autosomes as they approach an active X or Y chromosome. -
Answers - C
. An isogenic line is one
A. Where all progeny are genetically identical (except for being either male or female)
B. Where all progeny are genetically heterogeneous (including males and females)
C. Where all progeny are obtained from a multiple unrelated parents.
D. Where all progeny are mated with an outgroup.
E. Where only the iso alleles of genes are found. - Answers - A
. In plants, introgression could refer to
A. Elimination of all undomesticated genes from parental stocks to give isogenic lines.
B. Regression of a domesticated stock to it undomesticated state.
C. Ingressing environmental effects to complement genetic background.
D. The introduction of a new gene or allele from an undomesticated variant.
E. Self reflection on the part of the species to improve its genetic stock. - Answers - D
Rapid incorporation of a trait into a domesticated species by breeding
A. Requires a complete biological understanding of the trait.
B. Requires continuous outbreeding of stocks to eliminate the responsible gene.
C. Requires minimal linkage.
D. Requires strong linkage to molecular markers.
ANSWERS
Mendel's first law states that:
A. All mating must be random to study inheritance patterns in peas.
B. Multiple alleles of a gene must be present in each individual.
C. Alleles of a gene separate during gamete formation.
D. Alleles are alternative forms of a gene present in a population.
E. Formative patterns of inheritance exist only for plants and animals. - Answers - C
Mendel's second law asserts that:
A. All lethal genes assort independently during gamete formation.
B. Gamete formation yields only recessive and dominant alleles.
C. Gamete pairs are segregated during meiosis I, not meiosis II.
D. Different gene pairs assort independently during gamete formation.
E. All linked genes must recombine during gamete formation. - Answers - D
The material responsible for conveying genetic information between mammalian
generations is:
A. Protein
B. Lipid
C. Deoxyribonucleic Acid
D. Carboproteins
E. Ribonucleic Acid - Answers - C
A fundamental principal of Mendel's model of inheritance is:
A. The environment does not impose selection for traits.
B. Genes linked to disease exist in populations.
C. Genes can only be studied in non-random breeding populations.
D. Genes inherited from parents control the phenotype of the progeny.
E. Selection is only imposed on deleterious traits. - Answers - D
. You perform the following cross with a new species of frogs
A/a; B/b X A/a; B/b
Where A == green ; a == red skin and B == long claws b == short claws
The following progeny were obtained:
Green skin; long claws 270
Green skin; short claws 90
Red Skin; long claws 90
Red Skin; short claws 0
These results are consistent with:
, A. Sex linked genes with increased homozygous viability.
B. Two unlinked genes ; double recessive homozygote is lethal.
C. One linked gene; double recessive homozygote is lethal.
D. Two non-recombining genes ; double recessive introgression.
E. Continuous traits homozygosing over multiple generations. - Answers - B
. The pseudoautosomal region of sex chromosomes
A. Allows sex chromosomes to behave as homologs during meiosis and mitosis.
B. Is only found in species where the homogametic sex is male
C. Are always inactivated regardless of whether the X chromosome is in a male or a
female.
D. Balance all autosomes during mitochondrial duplication.
E. Causes chromosomes to be ejected from the nucleus. - Answers - A
. Evidence that cells can count the number of X chromosomes they contain is provided
by
A. The ability of human males with a normal karyotype to inactivate their X
chromosome.
B. The observation that Barr bodies are found associated with mitochondrial DNA.
C. Kleinfelter's syndrome males, where one of the two X chromosomes is inactivated.
D. Inactivation of the Y chromosome in XXY human females.
E. Regional inactivation of autosomes as they approach an active X or Y chromosome. -
Answers - C
. An isogenic line is one
A. Where all progeny are genetically identical (except for being either male or female)
B. Where all progeny are genetically heterogeneous (including males and females)
C. Where all progeny are obtained from a multiple unrelated parents.
D. Where all progeny are mated with an outgroup.
E. Where only the iso alleles of genes are found. - Answers - A
. In plants, introgression could refer to
A. Elimination of all undomesticated genes from parental stocks to give isogenic lines.
B. Regression of a domesticated stock to it undomesticated state.
C. Ingressing environmental effects to complement genetic background.
D. The introduction of a new gene or allele from an undomesticated variant.
E. Self reflection on the part of the species to improve its genetic stock. - Answers - D
Rapid incorporation of a trait into a domesticated species by breeding
A. Requires a complete biological understanding of the trait.
B. Requires continuous outbreeding of stocks to eliminate the responsible gene.
C. Requires minimal linkage.
D. Requires strong linkage to molecular markers.
