The dominance pattern of a gene can be determined from the phenotypes of the parents and offspring. In the examp assume that each parent is homozygous for the specific allele and that the progeny are heterozygous. Classify each either complete dominance, incomplete dominance, or codominance.
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- Shown in the pictures below are the degrees of dominance in the inheritance of flower color in some plants. *Based on the phenotypes (or maybe genotype), differentiate between complete dominance, incomplete dominance, and codominance. Be able to discuss the difference briefly but concisely. You may also refer to the definition.Let’s suppose a gene exists as a functional wild-type allele and anonfunctional mutant allele. At the organism level (i.e., at the levelof visible traits), the wild-type allele is dominant. In a heterozygote,discuss whether dominance occurs at the cellular or molecularlevel. Discuss examples in which the issue of dominance dependson the level of examination.The complete dominance of one allele over another results in the dominant allele (capital letter) always being expressed, even when it is combined with a recessive allele (lower case letter). Name three beepopper traits that represent complete dominance.
- All of the following statements aboutinheritance are true, except one. Which one of the following statements is INCORRECT ? O All genes have two alleles: one dominant and one recessive. Some phenotypes arise from the interaction of more than one gene. O Incomplete dominance is when heterozygotes express a phenotype that appears to be a blend between the phenotypes of homozygotes. O Even If you know the genotypes of both parents, you cannot always know with certainty the genotype their child will have.What is a reciprocal cross? Suppose that a gene is found as a wildtype (functional) allele and a recessive mutant (nonfunctional)allele. What would be the expected outcomes of reciprocal crossesif a true-breeding normal individual was crossed to a true-breedingindividual carrying the mutant allele? What would be the results ifthe gene is maternally inherited?n a container/tub, place 50 pieces ofred paper, 50 pieces of pink paper, and50 pieces of white paper. Let usassume that each color is thephenotypic expression of thegenotypes homozygous dominant AA(red), heterozygous Aa (pink), andhomozygous recessive aa (white).Without looking, randomly pick 20 pieces of paper from your container/tub and assumethat those individuals died upon picking, thus will be removed from your population. a. If you are a picky eater and prefer the white only, what do you think will happen in the genotypic frequency and allelic frequencies of the red, pink and white pieces of papers?
- A sex-influenced trait is dominant in males of a certain speciesof animal and causes bushy tails. The same trait is recessive infemales. Fur color is not sex-influenced.Yellow fur is dominantto white fur. A true-breeding female with a bushy tail and yellowfur was crossed to a white male without a bushy tail (i.e., a normaltail). The F1 females were then crossed to white males withoutbushy tails. The following results were obtained: A. Conduct a chi square test to determine if these two genes arelinked.B. If the genes are linked, calculate the map distance betweenthem. Explain which data you used in your calculation.In rabbits, black color (B) is dominant to brown (b), while fullcolor (C) is dominant to chinchilla (c ch). The genes controllingthese traits are linked. Rabbits that are heterozygous for bothtraits and express black, full color are crossed to rabbits thatexpress brown, chinchilla with the following results:31 brown, chinchilla 34 black, full16 brown, full 19 black, chinchillaDetermine the arrangement of alleles in the heterozygousparents and the map distance between the two genes.In cats, the allele (B) produces black color but (b) producesyellow color. These alleles are co‐dominant to each other. Aheterozygote produces a tortoise‐shell color. The alleles (B)and (b) are sex‐linked as well. Cross a tortoise‐shell femalewith a yellow male. What percent of their offspring will be yellow? What percent of their offspring will be black? What percent of their offspring will be tortoise shell?
- In horses, height is controlled by incomplete dominance. The two alleles are Tall (T) and short (T’). The heterozygous genotype is expressed as medium height. What is the phenotype of a horse with the genotype TT? What is the phenotype of a horse with the genotype T’T’? What is the phenotype of a horse with the genotype TT’? *Purple flowers are dominant to white flowers. Identify the phenotypefor the following genotype Ff, FF, ff and determine if the genotype is heterozygous or homozygous. * For each row, you should select two columns. Purple flowers White flowers Heterozygous Homozygous Ff FF ff Brown eyes are dominant to blue eyes. Identify the phenotype for the following genotype BB, Bb, bb and determine if the genotype is heterozygous or homozygous. * 口 ロ口The following is totally made up (not real). unicorn mane color shows incomplete dominance. R codes for a red mane. r codes for a blue mane. What would be a reasonable phenotype for an individual who is Rr? some red strands in the mane and some blue strands O purple mane O blue mane red mane