chapter 11 review answers 1

1) If the frequency of a recessive allele is 30% in a population of 100 people, how many would you predict would be carriers of this allele, but would not express the recessive phenotype?

1. A black guinea pig is crossed with an albino guinea pig, producing 12 black offspring. When

3. a) A plant can have either tall (T) stems or short (t) stems. Two plants are crossed. One has the genotypeTt and the other has the genotype Tt. Fill in the Punnett square below for this cross. (1

3. When Mendel transferred pollen from one pea plant to another, he was ___ the plants.

For one of the monohybrid crosses you performed in this Investigation, describe how to use the phenotype ratios to determine

---If given traits and parents, be able to use a Punnett square or patterns to predict the probability of offspring for a given cross and express it as a fraction, percent, or ratio.---

Recall from the background information that purple corn kernels are dominant and yellow kernels are recessive. The second ear of corn was the result of crossing two heterozygous ears of male purple corn (Pp x Pp). This is represented by the Punnett square below. Complete the Punnett square by writing the correct letters that correspond to each number indicated in the table. (4 points)

This Punnet Square represents the F1 offspring breeding with each other to create more offspring. This second set of offspring is the F2 generation. If both parents are heterozygous dominant, then the offspring expected would be: 50% heterozygous dominant, 25% homozygous dominant and 25% homozygous recessive.

Based on my survey I feel that free earlobes, no hair present between second and third knuckles, straight hair line, curly hair and no cleft chin are the most dominant trait because they had the highest percentage.

2. How will the alleles for these traits assort into the gametes that each parent might produce? (Hint: For a reminder on how alleles sort independently into gametes, refer to the illustration in Part 2, Question 2, in the Student Guide.)

Natural selection, together with the rules of inheritance discovered by Gregor Mendel, stand at the basis of modern evolutionary biology.

The variables in this lab were different than the average science experiment. Instead of affecting the experiment to prompt different results, we just had F1 generation plants produce offspring so that we could study their specific traits. By looking at the variables, we can determine if they fit the Mendelian ratio and see if genes are linked on a chromosome.

You are also provided with a heterozygous female, and a homozygous recessive male for a genetic cross. In this particular female, all the dominant alleles are on one chromosome, and the recessive counterparts are on the other homologous chromosome. Due to a chromosomal condition, in the female no recombination occurs between the M and N loci. Normal recombination occurs between the L and M loci. Diagram this cross, and show the genotypes and frequencies of all offspring expected from this cross.

Gregor Mendel was honorable for his many accomplishments. While experimenting with pea plants, he discovered the laws of inheritance. From this he made Mendel’s Laws of Heredity. He became the vice president of the National Science Society in 1868. He was later a nominee for the Order of Franz Josef in 1872. Finally he was awarded the Medal of the Heitzing Horticultural Society in 1882.

3. Carlson, Elof Axel. Mendel's Legacy: The Origin of Classical Genetics. Cold Spring Harbor, NY: Cold Spring Harbor Laboratory, 2004. Print