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QUESTION 1

If Plant 1 has a genotype of YY and Plant 2 has a genotype of yy, what is Plant 1's phenotype (the physical appearance of the plants' seeds)?

0.5 points

QUESTION 2

If Plant 1 has a genotype of YY and Plant 2 has a genotype of yy, what is Plant 2's phenotype (the physical appearance of the plants' seeds)?

0.5 points

QUESTION 3

What are the possible genotypes for offspring between Plant 1 and Plant 2?

1 points

QUESTION 4

What are the possible phenotypes for offspring between Plant 1 and Plant 2?

1 points

QUESTION 5

Now, trade one allele between plants such that each is heterozygous for the color trait. Fill in the Punnett Square below, with one plant's allele's in the dark boxes along the top, and the other plant's alleles in the dark boxes along the left.

1.5 points

QUESTION 6

What are the possible genotypes for offspring between Plant 1 and Plant 2?

, ,

0.5 points

QUESTION 7

What percentage of offspring would you expect to have each genotype?

YY %

Yy %

yy %

1 points

QUESTION 8

What are the possible phenotypes for offspring between these two plants?

,

1 points

QUESTION 9

What percentage of offspring would you expect to have each phenotype?

Yellow %

Green %

1 points

QUESTION 10

Mendel developed his Law of Segregation after observing two generations of crossed pea plants. His first generation plants were homozygous(as were yours). The second generation of crossing happened between two heterozygous plants (as in Question 5).

Imagine that the prevailing hypothesis of the time is that traits from the mother and father tend to blend together in offspring. Why did the results of Mendel’s experiment prompt him to come up with the Law of Segregation instead?

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Related questions

Question 1 Select one answer. 10 points Crossing over occurs:_______________.

during both meiosis I and meiosis II

during mitosis but not meiosis

during meiosis II only

during meiosis I only

Question 2 Select one answer. 10 points Homologous pairs ofchromosomes line up at the center of the cell in during which stageof meiosis?

Metaphase I,

Metaphase II,

Telophase I,

Telophase II

Question 3 Select one answer. 10 points A haploid organism hashow many copies of each chromosome?

1, 2, 3, 4

Question 4 Select one answer. 10 points The sister chromatidsseparate during which stage of meiosis?

Anaphase I, Anaphase II, Prophase I, Prophase II

Question 5 Select one answer. 10 points Describe the importanceof independent assortment: ________________________.

will assort independently of each other,

will sort to the same gamete,

are called alleles

All of these are true

Question 6 Select one answer. 10 points How many differentgametes are produced by a cell with the genotype AABb?

1, 2, 3,4

Question 7 Select one answer. 10 points The next two questionsare based on the following information. Part 1 of 2: In beansyellow (Y) is dominant to green (y) and smooth (S) is dominant towrinkled (s). What are the possible genotypes for the offspring ofthe following cross: YySS and YYSs.

Yy, SS, YY, Ss

YYSS, YySS, YYSs, YySs

YYSS, YYss, yySS, yyss

YS, yS, YS, yS

Question 8 Select one answer. 10 points Part 2 of 2: In beanswith yellow (Y) dominant to green (y) and smooth (S) dominant towrinkled (s): What are the phenotypes for the offspring in theexample in the previous question?

100% green wrinkled,

50% yellow smooth and 50% greensmooth,

100% yellow smooth,

50% yellow smooth and 50% yellowwrinkled

Question 9 Select one answer. 10 points Alleles are differentversions of a _______________.

chromosome,

genotype,

phenotype,

gene

1. Consider a cross between a pea plant that is heterozygous for round seeds and a pea plant that has wrinkled seeds. The allele for round seeds (R) is dominant over that for wrinkled seeds (r). Using a Punnett square, determine the genotypes of the offspring. 2. In Guinea pigs, the brown coat (B) is a dominant over the cream-coloured coat (b), and straight hair (H) is dominant over curly hair (h). Using a Punnett square, complete the cross between a heterozygous brown, curly-haired individual and a cream-coloured, homozygous straight-haired individual. State the parent genotypes, gametes, and the F1 Phenotypes and genotypes.

The seed color in a species of flowering plant can be either green or white, with the trait determined by two independently assorting loci. At one locus, the G allele produces green color and is dominant to the recessive g allele for white. At the other locus the dominant, C, allele code for color production and its recessive counterpart, c, codes for colorless or white seeds. A pure-breeding green seeded plant is crossed with a white- seeded plant homozygous for both loci.

a) Identify all possible genotype(s) for the white-seeded parent and the F1 genotype(s) that each would produce when crossed with the true-breeding green seeded plant.

b) Assume that the genotype of the original white-seeded parent is gg,cc,F1 plants from the cross described in a. are crossed to produce the F2. Identify the F2 phenotypes and their expected ratio.

c) What would be the probability of producing a white-seeded plant in a cross between two F2 plants of the genotypes Ggcc and ggCc.

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