BIO 353 Study Guide - Midterm Guide: Centromere, Prophase, Genetic Recombination

Question 1

What would be the dimensions of a Punnett square for the cross Hh x hh?

Question 2

In dogs, the gene for fur color has two alleles. The dominant allele (G) codes for grey and the recessive allele (g) codes for black fur. The female dog is heterozygous. The male dog is homozygous recessive. Figure out the phenotypes and genotypes possible in their puppies by using a Punnett Square. (provide answers on one line with commas between - xx, xx, xx, xx)

Genotypes: , ,

Phenotypes: ,

Question 3

The fundamental Mendelian process which involves the separation of alleles located at the same spot on the chromosome would be called ___.

Question 4

Using the information given on dominant and recessive traits, state the phenotype for each genotype. Purple flowers are dominant to white flowers in pea plants.

Question 5

In dogs, the gene for fur color has two alleles. The dominant allele (G) codes for grey and the recessive allele (g) codes for black fur. The female dog has black fur and the male dog is homozygous dominant. Make a Punnett square to determine the chance of getting each genotype and phenotype below.

Question 6

Using the information given on dominant and recessive traits, state the phenotype for each genotype. Round seeds are dominant to wrinkled seeds in pea plants.

Question 7

Using the information given on dominant and recessive traits, state the phenotype for each genotype. Hairy knuckles are dominant to non-hairy knuckles in humans.

Question 8

An allele is ___.

Question 9

In a cross of a round hybrid pea with a true breeding round parent (Rr x RR), what genotypic proportions would be observed in the offspring?

Question 10

What would be the dimensions of a Punnett Square depicting a dihybrid cross?

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

Diagram a cross between a true breeding pea plant that produces yellow seeds (G/G) with one that produces green seeds (g/g). Carry the cross out to the F2 generation. Answer the following questions:

What was the F1 genotype and phenotype?

What kinds of gametes could the F1 individuals produce?

What were the F2 genotypes and phenotypes, and in what ratios would you expect each to occur?

Diagram a cross between a true breeding pea plant that produces round seeds and purple flowers, with one that produces wrinkled seeds and white flowers. (Round and purple are the dominant traits.) Carry the cross out to the F2 generation. Answer the following questions:

What are the P1 genotypes?

What is the F1 genotype and phenotype?

What kinds of gametes will the F1 individuals produce?

What are the F2 genotypes and phenotypes?

What genotypic and phenotypic ratios are expected in the F2 progeny?

Diagram a cross between a true breeding pea plant that produces yellow seeds (G/G) and purple flowers (W/W) with one that produces green seeds (g/g) and white flowers (w/w). Carry the cross out to the F2 generation. Answer the following questions:

What was the F1 genotype and phenotype?

What kinds of gametes could the F1 individuals produce?

What were the F2 genotypes and phenotypes, and in what ratios would you expect each to occur?

Diagram a test cross of the F1 individuals from the question above, with the homozygous recessive parent strain. What genotypes and phenotypes would you expect in the testcross progeny, and in what ratios?

If you had a fruitfly with phenotype A, what test would you make to determine if it was Aa or AA? Explain the different outcomes expected if the fly in question is AA or Aa.

If individuals of genotype AaBbCc are intercrossed:

How many different genotypes can occur in their progeny? How many different phenotypes can occur in the progeny?