Genotypes & Phenotypes

Topic Page

Questions

• How do phenotypes appear in codominance?
• How can recessive traits skip generations?
• How do dominant and recessive alleles affect phenotype?
• What are some examples of recessive genotypes and phenotypes ?
• What are some examples of dominant alleles?
• What are genotypes?
• How do you write the heterozygous dominant genotype?
• What is a heterozygous genotype?
• What is a homozygous dominant genotype?
• How does dna relate to genes and alleles?
• How do multiple alleles affect the number of phenotypes?
• How are alleles and genes related?
• What are some examples of alleles?
• What are alleles?
• What is a genotype?
• How are genotypes and phenotypes related?
• What is a genotype and phenotype ratio?
• When analyzing a pedigree, how can you determine if an individual is a carrier (heterozygous) for the trait being studied?
• What is the probability that an individual heterozygous for a cleft chin (Cc) and an individual homozygous for a chin without a cleft (cc) will produce offspring that are homozygous recessive for a chin without a cleft (cc)?
• What is a homozygous genotype?
• If an organism expresses a recessive phenotype, can you tell the genotype?
• In a dihybrid cross, how are the genotype and phenotype ratios determined?
• How are genotypes used to determine phenotypes?
• A true breeding tall, purple flowered pea plant (TTPP) is crossed with a true breeding dwarf, white flowerd pea plant (ttpp). 1) What is the phenotype of the F1 Generation? 2) What is the genotype of the F1 Generation?
• How can lethal alleles affect phenotypic ratios?
• Which blood type is inherited by incomplete dominance?
• How are the terms gene, locus, and allele related?
• If you are studying a population a 92% exhibits the dominant phenotype, what percentage exhibits the recessive phenotype?
• During an experiment, a scientist crosses a pea plant that has purple flowers with a pea plant that has white flowers. The plants that result from this cross in the F1 generation have both purple and white flowers. What can the scientist conclude?
• In a certain plant, rough seeds (R) are dominant and smooth seeds (r) are recessive. Two plants with genotype Rr are crossed. What genotype would give their offspring smooth seeds?
• In a diploid organism, there are three different alleles for a particular gene. Of these three alleles, one is recessive and the other two alleles exhibit codominance. How many phenotypes with this set of alleles?
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• Is "purebred" synonymous with "homozygous"?
• Why are alleles IA and IB considered codominant?
• What are the genotype and phenotype of a plant that has the genotype #"RR"# for leaf color and #"Tt"# for height? Red leaf color is dominant and tall height is dominant.
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• Is it possible for organisms to possess different genotypes despite having same phenotype?
• Write the genotypes of the F1 and F2 plants?
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• If a purple flower with the genotype #Pp # (P = purple ; p = white) self-pollinates, what is the ratio of purple offspring to white offspring?
• If two phenotypically normal tigers that are heterozygous at this locus are mated, what percentage of their offspring will be cross-eyed?
• Why are few genetic disorders controlled by dominant alleles?