GN 301 Homework 8: Extensions to Mendelian Inheritance

The diagram below shows three genetic loci. Please answer the following questions about these three genes.

Mark each as true or false.

The A/a and B/b loci assort independently.

True

The A/a and G/g loci assort independently.

False

The B/b and G/g loci assort independently.  

True

Mark each gamete type as either parental or recombinant.

ABg

Parental

AbG

Recombinant

ABG

Recombinant

abg

Recombinant

In petunias, the blue allele (B) is dominant to the red allele (b) for flower color. At a linked locus, the tall allele (T) is dominant to the dwarf allele (t). The distance between the two loci is 21 cM. A plant has the chromosomes shown below. What percentage of gametes produced from this plant will have both the red and dwarf alleles? Enter only the numerical value for the percentage. Do not include the % symbol so that Moodle will grade this correctly. Round properly to 2 decimal digits.

10\.5

This question refers to the ABO blood type locus. Remember that the A and B alleles are codominant to each other and both are dominant to the O allele.

A man has blood type A. Mark all genotypes below that are possible for this man.

Select one or more:

AA and AO

This problem refers to the MN  and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive/negative part of the blood type. The Rh+ allele is dominant to the Rh- allele at this locus. Select all couples who could be the parents of a child with phenotype MN,AB+ based on the phenotypes at these three loci. If none of these couples could be the parents of this child, select "None of These".

Mother  Type M, A+ and Father Type N, B-

This problem refers to the MN  and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive/negative part of the blood type. The Rh+ allele is dominant to the Rh- allele at this locus. Select all couples who could be the parents of a child with phenotype N, AB- based on the phenotypes at these three loci. If none of these couples could be the parents of this child, select "None of These".

\n NOT

Mother Type MN, AB- and Father Type M, O-

In petunias, the blue allele (B) is dominant to the red allele (b) for flower color. At a linked locus, the tall allele (T) is dominant to the dwarf allele (t). The distance between the two loci is 25 cM. A plant has the chromosomes shown below. What percentage of gametes produced from this plant will have both the red and dwarf alleles? Enter only the numerical value for the percentage. Do not include the % symbol so that Moodle will grade this correctly. Round properly to 2 decimal digits.

12\.5

This question refers to the ABO blood type locus. Remember that the A and B alleles are codominant to each other and both are dominant to the O allele.

A man has blood type AB. His wife has blood type A. What blood types are possible for their children? Mark all that apply.

Select one or more:

A, B, AB

This problem refers to the MN  and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive/negative part of the blood type. The Rh+ allele is dominant to the Rh- allele at this locus. Select all couples who could be the parents of a child with phenotype M, O- based on the phenotypes at these three loci. If none of these couples could be the parents of this child, select "None of These".

Mother Type MN, O+ and Father Type MN, A-

This problem refers to the MN  and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive/negative part of the blood type. The Rh+ allele is dominant to the Rh- allele at this locus. Select all couples who could be the parents of a child with phenotype M, O+ based on the phenotypes at these three loci. If none of these couples could be the parents of this child, select "None of These".

Mother Type MN, O+ and Father Type MN, A-

In petunias, the blue allele (B) is dominant to the red allele (b) for flower color. At a linked locus, the tall allele (T) is dominant to the dwarf allele (t). The distance between the two loci is 8 cM. A plant has the chromosomes shown below. What percentage of gametes produced from this plant will have both the red and dwarf alleles? Enter only the numerical value for the percentage. Do not include the % symbol so that Moodle will grade this correctly. Round properly to 2 decimal digits.

4

This question refers to the ABO blood type locus. Remember that the A and B alleles are codominant to each other and both are dominant to the O allele.

A woman is blood type AB. Her child is blood type B. She wants to get child support from a man who is blood type A. Can this man be the father of the woman's child based on these data?

Yes

This problem refers to the MN  and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive/negative part of the blood type. The Rh+ allele is dominant to the Rh- allele at this locus. Select all couples who could be the parents of a child with phenotype N, O+ based on the phenotypes at these three loci. If none of these couples could be the parents of this child, select "None of These".

\n Mother Type MN, B+ and Father Type N, O+

and

Mother Type MN, O+ and Father Type MN, A-

This problem refers to the MN  and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive/negative part of the blood type. The Rh+ allele is dominant to the Rh- allele at this locus. Select all couples who could be the parents of a child with phenotype MN, A- based on the phenotypes at these three loci. If none of these couples could be the parents of this child, select "None of These".

\n Mother Type MN, AB- and Father Type M, O-

and \n Mother  Type M, A+ and Father Type N, B-

and

Mother Type MN, O+ and Father Type MN, A-