Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Biology Expert

1. Alternate forms of a gene that govern the expression of the same trait and that occur at the same positions on homologous chromosomes are called:
a. Chromatids.
b. mRNA.
c. Gametes.
d. Alleles.
e. Autosomes.

2. In Mendel's garden peas, the yellow color is dominant to the green. Additionally, smooth seeds are dominant to wrinkled seeds. In a dihybrid cross, a plant has a P generation consisting of smooth yellow and wrinkled green. The F1 generation consists of 100% smooth yellow. These plants are now self-fertilized and the F2 generation would show a phenotype ratio of:

a. 9:3:3:1
b. 3:1:1:3
c. 2:1:1:0
d. 2:1:1:2

3. For codominant genes, the standard procedure of using capital and lowercase letters for the different alleles is inadequate. For codominant genes, a superscript is used. For ex, the human blood type A allele is indicated as "IA" and the Type B allele is indicated as "IB." The recessive allele that is responsible for Type O blood is still given the lowercase letter "i." In a family of six children, two are blood Type O, two are blood Type AB, one is blood Type B, and another Type A. What are the possible genotypes of the parents?
a. IAi x IAIB.
b. IBi x IAIB.
c. IAi x IBi.
d. IAIB x ii.

4. The fact that all seven of the garden pea traits studied by Mendel obeyed the principle of independent assortment means that:

a. Seven pairs of alleles determining these traits behave as if each is on separate chromosome pairs.
b. Garden pea plants produce gametes with seven chromosomes.
c. Garden pea plants have seven pairs of chromosomes.
d. Seven pairs of alleles determining these traits are on the same pair of homologous chromosomes.

5. A cross between two homozygous individuals (RR)(rr) at two incompletely dominant genes will produce an expected phenotypic ratio in the F2 generation of:
a. 15:1.
b. 1:2:1.
c. 9:3:3:1.
d. 1:2:2:4:1:2:1:2:1.

6. Duchenne muscular dystrophy is caused by a sex-linked allele. Its victims are almost always boys who die before the age of 20. Why is this disorder almost never seen in girls?
a. Sex-linked traits are never seen in girls.
b. Males carrying the allele don't usually live long enough to reproduce.
c. The allele is carried on the Y chromosome.
d. Girls must receive the allele from both their mother and their father.

7. Hemophilia is a sex-linked disorder. Which is the best prediction of the offspring if the mother is a carrier and the father has hemophilia?
a. All sons and daughters will have hemophilia.
b. All sons will have hemophilia and all daughters will be normal.
c. 50% of the sons will have hemophilia and 50% of the daughters will have hemophilia.
d. 25% of the daughters will have hemophilia and all of the sons will have hemophilia.

8. When can a trait be expressed when only one allele for that trait is present?
a. When the allele is recessive.
b. When the allele is on the X chromosome in a female.
c. When the allele is on the X chromosome in the male.
d. When the allele is on the Y chromosome in the female.

9. A female is born with color blindness. What must have happened?
a. Her father is colorblind and her mother is not.
b. Her mother is colorblind and her father is not.
c. Her father is colorblind and her mother is a carrier of the trait.
d. Her mother is colorblind and her father is a carrier of the trait.

10. If a disease is caused by a dominant allele, it means that a person with the disease:
a. Will always pass it on to their children.
b. Only needs to have one copy of the allele that causes the disease in order to have symptoms of the disease.
c. Will only pass it on to children if their mate also has the disease.
d. Is more likely to be male.

Biology, Academics

  • Category:- Biology
  • Reference No.:- M927529

Have any Question? 


Related Questions in Biology

Topic genomicsquestion describe how the use of genetic

Topic: Genomics Question: Describe how the use of genetic knowledge can change the course of disease. What are the implications of the prolific use of genetic knowledge for the intervention of disease? Should there be an ...

Select a current news item pertaining to an ethical

Select a current news item pertaining to an ethical situation in the Middle East that has arisen in a business or non-profit organization. Describe the situation and the organization. Determine what made or makes this si ...

Elisa uses an enzyme-linked antibody to detect and antigen

ELISA uses an enzyme-linked antibody to detect and antigen. Briefly explain how use of the enzyme is ELISA could amplify the detection of a very small amount of antigen in a sample.

There are approximately 4000 dna sites in the yeast genome

There are approximately 4000 DNA sites in the yeast genome which could potentially bind the yeast transcription factor GAL4, but only 10 sites control genes necessary for galactose metabolism. In one chromatin immunoprec ...

What do we refer as an increase in thickness of ozone layer

What do we refer as an increase in thickness of ozone layer in stratosphere?

Terminology cell division andgeneticswrite short

Terminology Cell Division andGenetics Write short definitions for each ( 1 or 2 sentences ) Sexual reproduction- Asexual reproduction- Centromere- Metacentric- Submetacentric- Telocentric- Chromatids- Karyotype- Centriol ...

Hey you answered my question about gastrulation and there

Hey you answered my question about Gastrulation and there were 2 different answers I received. Are you sure gastrulation produces pluripotent stem cells?

Choose a species of plant or animal and research its basic

Choose a species of plant or animal and research its basic biology. Describe your species and its ecology. What kinds of factors are likely to regulate the population size of this species? Can you name any specific facto ...

How does sexual reproduction benefit the offspring in

How does sexual reproduction benefit the offspring in terms of genetic variation? Provide an example

Topic cleveland clinicfor the final portfolio project you

Topic: Cleveland Clinic For the final Portfolio Project you will submit a written paper developing an organization's strategic marketing plan that you could share with the organization's board of directors.  You may wish ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro