Biology

Codominance is a form of inheritance in which two different alleles for a gene are both expressed, and neither allele is dominant over the other. The alleles for type A blood and type B blood are codominant. If a man who is homozygous for type A blood and a woman who is homozygous for type B blood have children, what would you expect to find in the children? (2 points)


Half will have type A and half will have type B blood.

The children will all have type B blood.

The children will all have type AB blood.

The children will all have type A blood.

  1. 👍
  2. 👎
  3. 👁
  1. Since Jiskha doesn't have a biology expert at this time, please try posting your question at this site.

    http://www.biology-online.org/biology-forum/

    In addition, be sure to make really good use of Khan Academy!
    http://www.khanacademy.org/science/biology
    Choose from the general topics at the right and then find the specifics you need within each topic.

    1. 👍
    2. 👎
    👤
    Writeacher
  2. Codominance means both are expressed in the presence of each other. If there is one allele of each, then both A and B will be expressed (giving AB type).
    If either an A allele is paired with a different one, such as O, then the dominance is expressed and the resulting blood type is A. Similar phenomenon with B.

    Since one parent is homozygous with A type (i.e. AA) and the other is homozygous with B type (i.e. BB), then the children will always have an A allele and a B allele,giving AB blood type in all cases.

    The above reading recommendations from Writeacher are excellent. In particular, read up on sickle cell anemia alleles. It is even more interesting.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. due soon

    Question 1 A) What would be the result of a cytosine base being substituted for a thymine base in a DNA segment during DNA replication? (1 point) The entire segment of DNA would be affected. There would be no effect on the DNA.

  2. Biology

    Genetic Factors in Inheritance Quick Check. 1. What is the definition of epistasis? A. When the allele of one gene changes the genotype of another gene. B. When the allele of one gene changes the phenotype of another gene. C. When

  3. Genetic Factors in Inheritance Quick Check

    Questions: 1.What is the definition of epistasis? 2.Which is an example of codominance? 3.Consider that a plant with genotype RR has red flowers and a plant with genotype WW has white flowers. This plant species expresses

  4. genetic variation from meiosis quick check

    1. Why is is important for gametes to be haploid? - they fuse to form a diploid organism so there is a correct number or chromosomes. 2. The inheritance pattern of one gene will not affect the inheritance pattern of another gene.

  1. All

    Which trait is inherited? (1 point) Physical fitness Scars Freckles** Hair length what is an allele? (1 point) A trait that appears in an offspring if one of the parents contributes it A variant form of a gene** A trait that can

  2. Science

    In pea plants, the allele for purple flowers, P, is dominant over the allele for white flowers, p. Which conclusion about phenotype and genotype is possible?(1 point) If a plant has white flowers, then its genotype must be pp. If

  3. DNA Unit Test

    Question 1 A) What would be the result of a cytosine base being substituted for a thymine base in a DNA segment during DNA replication? (1 point) The entire segment of DNA would be affected. There would be no effect on the DNA.

  4. biology

    Question 7 A) What is the phenotype of a mouse that has the genotype Bb where B is the gene for black fur and b is the gene for brown fur assuming this gene follows a Mendelian inheritance pattern?(1 point) fur with black hairs

  1. ScIeNcE

    What is the name for one side of a chromosome?(1 point) A: centromere B: gene C: chromatid *** D: protein HERES ALL DA ANSWERS! 1: Chromatid 2: Chromosomes are made up of genes. 3: The phenotype for height is tall, and the

  2. DNA Unit Test

    Question 1 A) What would be the result of a cytosine base being substituted for a thymine base in a DNA segment during DNA replication? (1 point) The entire segment of DNA would be affected. There would be no effect on the DNA.

  3. biology

    What would be the result of a cytosine base being substituted for a thymine base in a DNA segment during DNA replication? (1 point) The cytosine base would pair with adenine when the DNA was replicated. The cytosine base would

  4. Biology

    I just need help with a few questions, please! During Meiosis, the alleles on each gene will separate individually into the gametes. This means that no matter what alleles were paired together in the parent, each gamete receives

You can view more similar questions or ask a new question.