Concept explainers
To discuss:
Dominant and recessive alleles; the difference between the homozygous and heterozygous individuals; why some alleles are homozygous; and others are heterozygous in a person.
Introduction:
DNA is a genetic material consisting of a long stretch of
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- Achondroplasia, which is characterized by difficulty converting cartilage to bone and thus results in shortened limbs. This trait is autosomal dominant. (A = achondroplasia allele; a = average height allele.) A husband and wife both have achondroplasia. The couple have a total 12 living children: 6 boys and 6 girls. The husband is colorblind, which is an X-linked recessive trait, and the wife believes there is a chance she is a carrier of colorblindness, since that trait runs in her family. One of the couple’s daughters and three of their sons are colorblind. (Xc = colorblindness allele; XC = normal color vision allele.) A. What are the complete genotypes of the husband and of the wife with respect to both colorblindness AND achondroplasia. Please EXPLAIN your answer. Be sure to indicate which genotype is that of the husband and which is that of the wife.arrow_forwardAchondroplasia, which is characterized by difficulty converting cartilage to bone and thus results in shortened limbs. This trait is autosomal dominant. (A = achondroplasia allele; a = average height allele.) A husband and wife both have achondroplasia. The couple have a total 12 living children: 6 boys and 6 girls. The husband is colorblind, which is an X-linked recessive trait, and the wife believes there is a chance she is a carrier of colorblindness, since that trait runs in her family. One of the couple’s daughters and three of their sons are colorblind. (Xc = colorblindness allele; XC = normal color vision allele.) a) Draw a Punnett square that illustrates the GENOTYPES of all of the children that could be CONCEIVED by this couple. b) What fraction of all of this couple's LIVING/SURVIVING children will have achondroplasia AND simultaneously be colorblind? c)arrow_forwardhow An inversion can affect phenotypearrow_forward
- A genetic to lilustrate how a father with blood group A and a mother with blood group B could have four childrenarrow_forwardhow combinations of variants (rather than individual variants considered one at a time) can contribute to specific traits.arrow_forwardThe 6 genetic inheritance patterns that do not follow Mendel’s Laws.arrow_forward
- Multiple correct answersarrow_forwardThe probability of rolling a two or four on a six sided dicearrow_forwardthe following parents to create a Punnet Square and answer the question. Cross a heterozygous father with a heterozygous mother. (you can use the letter A for your parental genotypes) What percent of the offspring will exhibit the dominant phenotype?arrow_forward
- State law of segregation.arrow_forwardPlease help a bit confused, don't need detailed response just an understanding of the ideaarrow_forwardNumber of offspring resulting from a Punnett square that are homozygous recessive when a heterozygous parent is crossed with a homozygous dominant parentarrow_forward
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning