BIOD 210 GENETICS EXAMPREP REVIEW
SHEET WITH TESTED QUESTIONS AND
COMPLETE SOLUTIONS
●● Describe Sickle Cell Anemia
Answer: People who inherit a mutant copy of the β-globulin protein
from both parents have sickle-cell anemia. The mutant β-globulin causes
the hemoglobin within red blood cells to distort when the oxygen in the
blood is low, and in fact, deforms the cell shape so much that the
distorted cells break very easily. In turn, the loss of the broken cells
lowers the total number of red blood cells, resulting in anemia
In addition, the odd shape of the red blood cells actually causes
blockages in small blood vessels, which causes pain and damage to the
brain, heart, muscles, and kidneys. The condition is especially
exacerbated under atmospheric conditions where oxygen is lower, so
people with sickle-cell anemia can become extremely sick at high
altitudes.
●● Why did Mendel use a pea plant for his studies?
Answer: - Easy to grow and breed
- Self-fertilizing
- Easy to cross-breed
, ●● A __________ cross occurs when two pure individual parental
strains are mated that contrast ONLY in the trait that is being observed
Answer: monohybrid
●● In genetics, _______ refers to the original parental generation
Answer: P1
●● The first set of offspring from the parents are called the ___
generation, which stands for ______________.
Answer: F1 , first filial generation
●● The term _____________ is used to describe the physical
manifestation of any trait
Answer: phenotype
●● In the second generation of a heterozygous monohybrid cross, what
percentage of the offspring have the dominant phenotype? recessive?
Answer: 75%, 25%
the ratio is 3:1
●● Define gene
Answer: a gene is defined as a unit of heredity that is transferred from a
parent to offspring and is held to determine some characteristic of the
offspring
SHEET WITH TESTED QUESTIONS AND
COMPLETE SOLUTIONS
●● Describe Sickle Cell Anemia
Answer: People who inherit a mutant copy of the β-globulin protein
from both parents have sickle-cell anemia. The mutant β-globulin causes
the hemoglobin within red blood cells to distort when the oxygen in the
blood is low, and in fact, deforms the cell shape so much that the
distorted cells break very easily. In turn, the loss of the broken cells
lowers the total number of red blood cells, resulting in anemia
In addition, the odd shape of the red blood cells actually causes
blockages in small blood vessels, which causes pain and damage to the
brain, heart, muscles, and kidneys. The condition is especially
exacerbated under atmospheric conditions where oxygen is lower, so
people with sickle-cell anemia can become extremely sick at high
altitudes.
●● Why did Mendel use a pea plant for his studies?
Answer: - Easy to grow and breed
- Self-fertilizing
- Easy to cross-breed
, ●● A __________ cross occurs when two pure individual parental
strains are mated that contrast ONLY in the trait that is being observed
Answer: monohybrid
●● In genetics, _______ refers to the original parental generation
Answer: P1
●● The first set of offspring from the parents are called the ___
generation, which stands for ______________.
Answer: F1 , first filial generation
●● The term _____________ is used to describe the physical
manifestation of any trait
Answer: phenotype
●● In the second generation of a heterozygous monohybrid cross, what
percentage of the offspring have the dominant phenotype? recessive?
Answer: 75%, 25%
the ratio is 3:1
●● Define gene
Answer: a gene is defined as a unit of heredity that is transferred from a
parent to offspring and is held to determine some characteristic of the
offspring
