BIO 201 Study Guide - Midterm Guide: Mendelian Inheritance, Zygosity, Gamete

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28 Sep 2016

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Mendel and the gene idea: monohybrid cross: the mating or the cross of two heterozygous parents resulting in offspring that are rr, rr and rr (1:2:1 or. The factor of the white flowers was not diluted or destroyed because it appears in the f2 generation. 10. mendel"s observation of the segregation of the alleles in gamete formation is based on the the cell phase anaphase of. 11. mendel"s second law of independent assortment is based on metaphase 1 in. Meiosis, specifically the alignment of tetrads at the equator. The phenomenon is seen with red snapdragons crossing with white snapdragons, and all of their f1 offspring are pink flowers. Alleles of a gene are not completely dominant or recessive. Multiple alleles: most genes exist in more than 2 allelic forms (more than 2 alleles). When more than 2 distinct phenotypes are present in a population due to multiple allelism the trait is called polymorphic. (i^a and i^b).

Related Questions

Please assist with the following. Please no hand-written work, but typed work and thorough explanations please including Punnett Squares. Please Ignore Sex, as these are not sex-linked traits

Dihybrid Testcrosses

In the following crosses, the wild trait is dominant and the brown trait for eye color and ebony trait for body color are both recessive. You will compare the offspring of homozygous wild flies to the offspring of heterozygous wild flies, when each is crossed with a recessive brown-eyed fly with an ebony body.

7. Perform a monohybrid cross between a wild-type female fly and a male fly with brown eyes and ebony body.
Show results for the F₁ offspring. (NOTE: You will use one of these F₁ flies in the next cross.)
ENTER DATA HERE:

PUNNETT SQUARE:

List the genotypes of the flies in this cross:

List the gametes produced by each fly in this cross:

Show the Punnett Square for the above cross.

Question: By examining the offspring, determine whether the wild-type female parent was homozygous or heterozygous for eye color and body color. How did you arrive at this conclusion?

Question: Are the F₁ offspring homozygous or heterozygous for eye color and body color? How did you arrive at this conclusion?

8. Now perform a cross between one wild-type F₁ offspring from the previous cross and a male fly with brown eyes and ebony body.
ENTER DATA HERE:

PUNNETT SQUARE:

List the genotypes of the flies in this cross:

List the gametes produced by each fly in this cross:

Show the Punnett Square for the above cross.

Question: Even though you already knew the genotype of the wild-type fly used in this cross, how can you tell by examining the offspring of this cross whether the wild-type fly in this cross was homozygous or heterozygous for eye color?

Question: What was the phenotypic ratio for the offspring resulting from this testcross?

If I observe a bed of mussels on the coast of California in which five species live where the abundances of each species are 22 for species #1, 466 for species #2, 719 for species #3, 18 for species #4, and 2,699 for species #5, what is the probability that I would randomly pick the third species?

(answer to 2 decimal places)

QUESTION 12

Which of the following calculations require that you utilize the addition rule?

A) Calculate the probability of a child having either sickle-cell anemia or cystic fibrosis if parents are each heterozygous for both

B) Calculate the probability of each of four children having cystic fibrosis if the parents are both heterozygous.

.

C) Calculate the probability of children with both cystic fibrosis and polydactyly when parents are each heterozygous for both genes

D) Calculate the probability of purple flower color in a plot of 50 plants seeded from a self-fertilizing heterozygous parent plant

Calculate the probability of black offspring from the cross AaBb Ã AaBb, when B is the symbol for black

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BIO 201 Study Guide - Midterm Guide: Mendelian Inheritance, Zygosity, Gamete

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