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7th Genetics

7th Genetics Study Guide

QuestionAnswer
In Mendel's first set of experiments, what percent of the F1 generation expressed the dominant factor? 100%
The Human Genome Project was launched in _____. 1990
What color (s) of flowers does a pea plant have if it inherits one factor for violet flowers and one factor for white flowers? violet
The traits of an individual make up the individual's _______ phenotype
An example of a recessive trait in pea plants is ____. green seed color
The position of a gene on a chromosome is its ______. locus
An example of a chromosomal disorder is ______. Down Syndrome
ABO blood type is an example of a (n) ________. multiple - allele trait
Which of the following represents a homoyzgous genotype? example AA, aa ( the same)
Which trait (s) did Mendel study in pea plants? pod form pod placement pod color
T or F Mendel's laws apply only to pea plants. False
T or F In pea plants, yellow seed color is a dominant trait. True
T or F Mendel demonstrated that the two factors controlling a trait always go to the same gamete. False
T or F A Punnett square shows exactly how many children of each genotype a given set of parents will actually produce? False
T or F There are fewer than 10,000 human genes . False
T or F The Human Genome Project was accomplished entirely by U.S. scientists. False
T or F Mendel's work was largely ignored until 1900. True
T or F Pea plants were a good choice for Mendel's research because they grow quickly. True
T or F For many traits, your phenotype is influenced by your environment True
T or F GMO's have been given traits that make them more useful for human purposes. True
Gregor Mendel is known as the father of _______. genetics
An individual with two different alleles for the same gene is called a (n) ________. heterozygote
Any disease caused by mutations is called a (n) _____ disorder. genetic
___________ is the use of technology to change the genetic makeup of living things for human purposes. Biotechnology
The first generation of offspring in a genetics experiment is called _____. F1
Mendel used the term ________ to describe a factor controlling a trait that always shows up in offspring. dominant
The expression of an individual's genotype is referred to as his or her _________. phenotype
The alleles that an individual inherits for a given gene make up the individual's ________. genotype
If two alleles for a gene are _______, they are expressed equally in heterozygotes. codominant
The human ________ consists of the complete set of human genes. genome
Describe and explain human variation in skin color. Skin color is a polygenic trait. They are controlled by more than one gene. Each gene for the trait may have two or more alleles and be found on the same or different chromosomes.
In a given family, the mother is a carrier for red -green color blindness, and the father has normal vision. They have one son and one daughter. What are the chances that the son has the red - green color blindness disorder? The daughter ? Explain Son has a 50% chance, daughter 0%. Since she is a carrier there is an equal chance of passing the regular X or the X with the the color blind trait. The male normally has only one X chromosome and it is passed by the mom.
In the case where the mother is a carrier for red-green color blindness and the father has normal vision, explain why the daughter will have 0 chance of having the disorder. The daughter would have a 50% chance of being a carrier but she will not have the disorder because it would have to be on both X's since she has two. The Dad has normal vision so he would not pass it.
Created by: cromine
 

 



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