BIO 273W Study Guide - Midterm Guide: Nuclear Dna, Centrosome, Cell Nucleus

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emeraldlizard684

26 Jan 2018

School

University of Hartford

Department

Biology - A&S

Course

BIO 273W

Professor

Levesque

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Document Summary

Dominant : inherited characteristic that appears in an offspring if it is contributed from a. Recessive: inherited characteristic that appears in an offspring if it is contributed from a parent through a dominant allele, only from 1 of 2 parental types parent through a recessive allele, masked by the dominant trait. Homozygous: two of the same alleles (two dominant or two recessive) (bb/bb) Heterozygous: one of each of the alleles (one dominant and one recessive) (bb) Distinguish between heterozygous and homozygous individuals with dominant. Testcross (be able to design and/or interpret results of a testcross) phenotype; cross between dominant/recessive phenotype and unknown phenotype. Monohybrid cross (be able to determine phenotypic and genotypic ratios using punnett. A cross between two plants differing in one trait. Learn the following terms and be able to explain each: Basic unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

Related Questions

When a parent who is heterozgyous for a trait is crossed with a parent who is heterozygous for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. have 3 out of 4 the dominant phenotype and 1 out of 4 the recessive phenotype

b. have 2 out of 4 the dominant phenotype and 2 out of 4 the recessive phenotype

c. all have the dominant phenotype

d. have 1 out of 4 the dominant phenotype

When a parent who is heterozgyous for a trait is crossed with a parent who is homozygous dominant for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. all have the recessive phenotype

b. all will have the dominant allele

c. all be homozygous dominant genotype

When a parent who is heterozgyous for a trait is crossed with a parent who is heterozygous for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. have 3 dominant phenotypes, 2 heterozygous genotypes, and 1 homozygous recessive genotype

b. have 1 dominant phenotype, 2 heterozygous genotypes, and 1 homozygous recessive phenotype

c. have all dominant phenotypes, 2 heterozygous genotypes, and 1 homozygous recessive genotype

When doing Punnett squares for fur, the letter f represents ______ and the letter F represents _____.

Select one:

a. the recessive allele, the dominant allele

b. the dominant allele, the recessive allele

c. the dominant gene, the recessive gene

d. the recessive gene, the dominant gene

10.

When a parent who is heterozgyous for a trait is crossed with a parent who is homozygous recessive for a trait, the offspring will:

(remember homozygous means two of the same alleles and heterozygous means two different alleles)

Select one:

a. be half heterozygous and half homozygous recessive

b. be all heterozygous

c. be all homozygous recessive

d. be all homozygous dominant

1. A dominant gene (H) produces wire-haired texture in dogs; its recessive allele (h) produces smooth hair. Two heterozygous wire-haired individuals were crossed and their F1 progeny testcrossed. Determine the expected genotype and phenotype rations among the testcross progeny. Note: in a testcross, an individual with an unknown genotype is crossed with a homozygous recessive individual.

2. A white guinea pig, whose parents were black, is closed with a black guinea pig whose male parent was white and whose female parent was black. Two white offspring result. Determine the genotypes of all individuals mentioned. About which individuals is there some doubt?

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1. A person is described as a carrier for a particular genetic disease. What does this tell you about their genotype?

2. For any given gene, the principle of independent segregation predicts that each gamete produced as a result of meiosis will contain ____________________

3. A pair of alleles is said to be heterozygous when:

4. In a diploid species, cells can have up to ___ alleles of a particular gene.

5. In a cross between a homozygous dominant parent and a homozygous recessive parent, the number of phenotypic classes observed in the offspring is ______

6. For a person of genotype Xx, the genotype of their gametes may be ______________

7. In a "test cross", an individual of unknown genotype is crossed with a ___ individual to determine the unknown genotype.

8. An albino woman has a child with a phenotypically normal man with no family history of albinism (which is a rare recessive disorder). What percentage of their children are likely to be albino?

9. An individual with the dominant phenotype, but an unknown genotype, is test-crossed, and all of the offspring exhibit the dominant phenotype. The genotype of the unknown individual is ______________

10. If two heterozygous individuals for a recessive disease (carriers) have a child, what is the chance that their child will develop the disease?

11. In a monohybrid cross between two true-breeding parents that both exhibit the dominant phenotype, ___ percent of the offspring will exhibit the recessive phenotype.

12. In a particular type of tomato plant, red fruit is dominant over yellow fruit, and dwarf height is a recessive trait. If two heterozygous plants were crossed, what proportion of the offspring would show the dominant phenotype?

13. In a cross between a BbRr individual and a BBRR one, what do the following represent: BR, Br, bR, br?

14. In humans, the gene that determines whether an embryo develops as a male or a female is carried on _____________

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BIO 273W Study Guide - Midterm Guide: Nuclear Dna, Centrosome, Cell Nucleus

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