HomeStudy Guides420,000CA160,000

Biology 1201A Study Guide - Midterm Guide: Cytokinesis, Gamete, Base Pair

51 views29 pages

raspberrytiger476

24 Nov 2015

School

Western University

Department

Course

Professor

For unlimited access to Study Guides, a Grade+ subscription is required.

Related Documents

Biology 1201A Chapter Notes - Chapter 10: Mns Antigen System, Sickle-Cell Disease, Karl Landsteiner

orangeturtle462

Biology 1201A Chapter Notes - Chapter 10: Familial Hypercholesterolemia, Ldl Receptor, Ganglioside

Biology 1201A Lecture Notes - Lecture 3: Dihybrid Cross, Chi-Squared Test, Abo Blood Group System

Related Questions

Jim is blood type A, his brother John is type O and his sister Jane is type AB. What are the genotypes of their parents?

Which of the following is true for alleles that show incomplete dominance?

Heterozygotes have a genotype like the dominant allele.

Homozygotes have a genotype like the recessive allele.

Heterozygotes have a phenotype intermediate between the dominant and recessive alleles.

Homozygotes have the same phenotype as the heterozygotes.

Which principle of inheritance concluded that when games are formed in meiosis, the two alleles of each gene separate from one another, and each gamete receives only one allele?

independent assortment

Which term best describes a condition in which alleles at one locus can alter the expression of alleles at another locus?

polygenic inheritance

multiple alleles

A single unit of genetic information located on a chromosome defines:

The physical expression (appearance or function) of an organism's genes defines:

a single characteristic

Palomino horses (golden color with a blond mane) are an incompletely dominant trait produced by the combination of the chestnut color allele and the cream color allele. If you wanted to produce as many palominos as possible, which mating strategy below would be the best choice?

Chestnut x Cream

Palomino x Cream

Palomino x Chestnut

Palomino x Palomino

Which term best describes the effect of a single gene on multiple aspects of the phenotype?

multiple alleles

polygenic inheritance

Which term best describes the separate expression of both alleles for a single trait in the same cell?

multiple alleles

polygenic inheritance

One form of a gene found on a single chromosome defines:

A chocolate lab (whose mother was a yellow lab) is mated with a black lab whose genotype is BbEe. What fraction of the offspring would be expected to be yellow labs?

What type of allele is always expressed regardless of whether the individual is homozygous or heterozygous for it?

Both the dominant and recessive alleles

Recessive allele

Allosteric allele

Dominant allele

Given the parents AABBGgHhrr Ã AabbGgHhRr, assume simple dominance and independent assortment. What proportion of the progeny will be expected to have the genotype AaBbggHHrr?

___________________ is defined as having two of the same type of allele for a particular trait.

Incomplete dominance

The physical position of an allele on a single chromosome defines:

Which term best describes two or more genes affecting the phenotype in an additive fashion?

polygenic inheritance

multiple alleles

coppersea-lion534

These all relate to exceptions to the inheritance patterns encountered by Mendel.â

Why do multiple and lethal alleles often result in modifications of the classic Mendelian monohybrid and dihybrid ratios?

Select the four correct statements.

-When an essential gene is mutated, it can result in a lethal phenotype. There are no classic Mendelian monohybrid and dihybrid ratios.

-In the case of codominance, heterozygotes produce gene products from both alleles of a gene. Classic Mendelian monohybrid and dihybrid ratios are modified by codominance.

-In the case of incomplete dominance, the phenotype of the heterozygote is distinct from and often intermediate to the phenotypes of homozygous individuals. Classic Mendelian monohybrid and dihybrid ratios are modified by incomplete dominance.

-Genes exist in a large number of allelic versions and a diploid organism has two homologous gene loci that may be occupied by different alleles of the same gene. This can result in many different phenotypes for traits, which may not follow typical Mendelian ratios.

-When an essential gene is mutated, it can result in a lethal phenotype. This results in a modification of classic Mendelian ratios.

-The phenotype of the heterozygous genotype is distinct from and often intermediate to the phenotypes of the homozygous genotypes. The joint expression of both alleles in a heterozygote is called codominance. There are no classic Mendelian monohybrid and dihybrid ratios.

-Genes exist in a large number of allelic versions, but in a diploid organism, only one allele of the gene can occupy one homologous gene loci. Classic Mendelian inheritance cannot explain this phenomenon.

-Each gene produces a unique gene product. The effect of one allele in a heterozygote completely masks the effect of the other. Classic Mendelian genetics cannot explain this phenomenon.

1. Three common alleles of the B (black) gene control coat color in most mammals: BB = black coat bb = dark brown coat bl bl = light brown coat They have the following dominance relationship: B > b > bl This notation means that B is dominant to both other alleles, and b is dominant to bl. How many genotypes are possible for black cats?

2. This is Part A of a two-part question. In Part A you'll choose the word to remove from this sentence, in Part B you'll choose the word to replace it with. Consider the following incorrect statement: In a heterozygote for a dominant/recessive allele pair we see the phenotype associated with both of the alleles. Part A Which underlined word makes the sentence incorrect? Part B Which word should replace the word you removed in Part A, to make the statement correct? In a heterozygote for a dominant/recessive allele pair we see the phenotype associated with both of the alleles.

3. Why do red blood cells heterozygous for the ABOA and ABOB alleles react to both Type A and Type B antisera?

4. Consider a mutation in a membrane-transport protein like CFTR. Which kind(s) of amino acid change in a trans-membrane segment would you expect to decrease the ability of the segment to stay in the membran A) Replacing a hydrophobic amino acid with a hydrophilic one B) Deleting a string of 3 hydrophobic amino acids C) Inserting a single hydrophilic amino acid D) Replacing a hydrophilic amino acid with a hydrophobic one E) None of the above choices are correct.