Concept explainers
To discuss:
Why some individuals may not exhibit the
Introduction:
DNA is a genetic material consisting of a long stretch of
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- an example of a condition which is inherited via homozygous genes and one which is heterozygous. Do not use things like hair color or the color of Mendel’s pea plants here- discuss genetic disordersarrow_forwardSuppose a maternal effect gene exists as a functional dominantallele and a nonfunctional recessive allele. A mother who is phenotypically abnormal produces all normal offspring. Explain thegenotype of the motherarrow_forwardMendelian Genetics and Non-Mendelian Genetics: Huntington’s disease, a neurodegenerative genetic disorder that typically becomes noticeable in middle age, is due to an autosomal dominant allele. Sickle cell anemia, on the other hand, is a genetic blood disorder due to a recessive allele. Jillian is a carrier of the allele for sickle cell anemia but has no sign of any neurodegenerative disorder in her family. She married Jacobwhose father died of Huntington’s disease. His mother, however, is not inflicted with that condition. Neither of his parents exhibit sickle cell anemia. 1. Give the genotypes of Jillian and Jacob. Assuming that they will have 4 children, what is the probability that: 2. all their children will be normal? 3. they will have a son with Huntington’s disease? 4. they will have a daughter inflicted with both conditionsarrow_forward
- Genes on one gene that affect the expression of genes at different locations are said to be alleles epistatic continuous linkedarrow_forwardNeo-Mendelian Genetics: Complete dominance and overdominance Huntington’s disease, a neurodegenerative genetic disorder that typically becomes noticeable in middle age, is due to an autosomal dominant allele. Sickle cell anemia, on the other hand, is a genetic blood disorder due to a recessive allele. Mary is a carrier of the allele for sickle cell anemia but has no sign of any neurodegenerative disorder in her family. She married Paul whose father died of Huntington’s disease. His mother, however, is not inflicted with that condition. Neither of his parents exhibits sickle cell anemia. What are the genotypes of Mary and Paul? If they plan to have four children, what is the probability that: all their children will be normal? ____________ they will have a son with Huntington’s disease? ___________ they will have a daughter inflicted with both conditions?____________arrow_forwardForms and Expressions of Alleles Classify each of the following phenotypes and genotypes using the vocabulary from this lesson. Phenotype Brown eyes/ Genotype one dominant brown allele and one Phenotype Blue eyes/Genotype two Phenotype Brown eyes/Genotype two recessive blue alleles dominant brown alleles recessive blue allele :: ::: ::: homozygous recessive homozygous dominant heterozygous Save Submit Google Chrome edu DELL 4 7 8. 9. tw #arrow_forward
- . BRCA1 is a bi-allelic gene (let's call the two alleles as C and c) that is inherited on an autosome. The C allele is completely dominant over c, expressing breast cancer as a phenotype. Eye color is determined by two independently assorting bi-allelic genes, B (alleles B and b) and G (alleles G and g), such that the Ballele shows dominant epistasis over the G and g alleles. Brown-eyed individuals have at least one copy of the B allele, green eyed individuals have at least one G allele, while blue eyed individuals have neither B nor G. A blue-eyed person whą is a heterozygote carrier for the BRCA1 gene has 3 children with a brown-eyed person (heterozygote for both B and G genes) who does not have breast cancer. (a) What are the possible genotypes and phenotypes of all their possible children? What are their respective probabilities of being observed (please write all genotype and phenotype probabilities)? (b) What is the probability that all three children will be blue-eyed and not…arrow_forwardStudy of how the inheritance of traits encoded by genes on sex chromosomes (sex-linked traits) differs from the inheritance of traits encoded by genes on nonsex chromosomes (autosomal traits) , indicate whether it focuses on transmission genetics, molecular genetics, or population geneticsarrow_forwardi). pronde. clear- cut. explenations.in differences/Similarīties, if ony, between." Extensnons of mendelren. mhentonce Vs. Non.- mendellen. nhentnce.arrow_forward
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