Imagine that you are studying a gene with two alleles, R and r. What genotypes (

Question

Imagine that you are studying a gene with two alleles, R and r. What genotypes (sets of alleles) would you expect to find in the offspring of two Rr parents? What is the probability of producing an offspring with each of the possible genotypes? The figure shows how these probabilities can be calculated. According to Mendel's law of segregation, what is the probability that a gamete (egg or sperm) from an Rr parent carries an R allele? What is the probability that a gamete from an Rr parent carries an r allele? When an Rr female is crossed with an Rr male, what is the probability of producing a homozygous dominant (RR) offspring? What is the probability of producing a homozygous recessive (rr) offspring? What is the probability of producing a heterozygous (Rr) offspring?

Explanation / Answer

According to Mendel's Law of segregation, each member of a pair of alleles maintains its own position, regardless of whether it is dominant or recessive. At reproduction, only one allele of a pair is transmitted to each gamete, and that choice is entirely random.

Parents –

1. According to Mendel's Law of segregation, the probability that a gamete (egg or sperm) from an Rr parent carries an R allele is 50%

2- The probability that a gamete from an Rr parent carries an r allele is 50%

Offspring –

3- When an Rr female is crossed with an Rr male, the probability of producing a homozygous dominant (RR) offspring is 25%

4. The probability of producing a homozygous recessive (rr) offspring is 25%

5. The probability of producing a heterozygous (Rr) offspring is 50%

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---