Heterozygous individuals suffer from the disease. If a heterozygous person has children with a normal (homozygous recessive) person, each child has a 50% chance of inheriting the disease.
What is the expected probability of a homozygous recessive individual from a cross between two heterozygous individuals?
Tutorial. The expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive).
What is the percentage that two heterozygotes produce an offspring with the recessive phenotype?
A monohybrid cross is a cross between two individuals with different alleles at one genetic locus. If we cross two heterozygous individuals (Aa), then the percentage of offsprings with recessive phenotype will be: Aa x Aa = AA Aa Aa aa, so recessive phenotypes would be 1/4 = 25%.
Can two homozygous parents have a heterozygous child?
For example, if one parent is homozygous dominant (WW) and the other is homozygous recessive (ww), then all their offspring will be heterozygous (Ww) and possess a widow’s peak. If both parents are heterozygous (Ww), there is a 75% chance that any one of their offspring will have a widow’s peak (see figure).
What is an example of heterozygous?
Your genes are made of DNA. … If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair.
What is the probability of having a heterozygous offspring?
Explain your answer. Heterozygous offspring are those containing two different alleles, in this case S and s. Therefore, the probability of heterozygous offspring is 0.5.
What happens when you cross two heterozygous parents?
A dihybrid cross tracks two traits. Both parents are heterozygous, and one allele for each trait exhibits complete dominance *. This means that both parents have recessive alleles, but exhibit the dominant phenotype. … Nine combinations produce offspring with both dominant phenotypes.