Exam 13: Chromosomes Mapping and the Meiosis - Inheritance Connection

You want to determine the temperature at which one would obtain a ratio of 1:1 of each gender.Which of the following conditions would (1)best address this question,and (2)is most scientifically sound?

A human female with only one X chromosome is said to have a condition called

If a human female has two Barr bodies,it is almost certain that

The most common fatal genetic disorder of Caucasians is

A genetic _____ contains the distances between the gene loci measured in terms of the frequency of recombination.

In a two-point cross to map genes A and B,you obtained 98 recombinant flies out of a total of 730 progeny.How far apart are these genes?

What is the relationship between recombination frequency and true genetic distance on a chromosome?

A fatal human disease in which the faulty gene codes for abnormal gland secretions leading to liver and lung failure is called ________________.

Based on this observation,

Humans who have lost even one copy of an autosome are called

If a female was a carrier for sex-linked color blindness,what percentage of her male children would also be color blind?

A 39-year-old woman is in her sixth week of pregnancy.Due to her advanced maternal age,she is at high risk for having a baby with Down's syndrome.She would like to find out as early as possible whether or not her baby has Down's syndrome.Her doctor suggests

_______________ is a human hereditary disease that is caused by a dominant allele but does not show up in affected individuals until they are in middle age.

Morgan's student Sturtevant demonstrated that the recombination frequencies between a series of linked genes is additive.Examine the following recombination data from Sturtevant,and determine the proper order of the genes on the Drosophila X chromosome.Assume y is in the 0.0 position.

Huntington's disease is caused by an autosomal dominant allele.It is a lethal disease,but it persists in the human population.Which of the following statements best describes why?

Genetic differences between individuals in a population are called

A same-sex couple wants to have a child in which they both contribute genetically to the offspring.Assuming it was technically possible to replace the DNA found in a sperm with female DNA,or DNA found in the egg with male DNA,what other scientific obstacle must be overcome?

How did the development of anonymous markers aid in the production of a human genetic map?

In sickle cell anemia,the defective hemoglobin differs from the normal hemoglobin by

The theory of chromosomal inheritance was first proposed by