Meiosis
What is the final product of meiosis?
4 genetically different cells
Give an example of Homozygous dominant.
AA
A plant with red flowers is pollinated by a plant with white flowers. The seeds are planted and pink flowers grew on the offspring. This is an example of.....
Incomplete dominance.
What shape is used to show an affected male in a pedigree?
A filled in square shape.
What is sickle cell disease?
A recessive disorder, where red blood cells are misshapen and stick together, causing blood clots.
What type of cells are made in meiosis?
Gametes
Give an example of a phenotype.
Curly hair
A white cat is mated with a black cat. All their kitten offspring had black and white spots. This is an example of....
co-dominance
In a pedigree, what do the roman numerals indicate?
Generations of family members
What is the genotype of a person with sickle cell disease?
aa
How many chromosomes are in a human gamete cell?
23
Bb is an example of which genotype description?
Heterozygous
Male pattern baldness is an X linked trait. What is the genotype of a mother that is a carrier for male pattern baldness?
XBXb
What is the shape for an unaffected female?
A circle that is not filled in
What is the benefit of being heterozygous for sickle cell disease?
Provides resistance to malaria infections
What is the purpose of crossing over?
To increase genetic diversity in offspring.
Two tall heterozygous pea plants are crossed. What % of their offspring will be short pea plants?
25%
Blood typing in humans has 3 possible alleles that combine to create our various blood types. This is an example of
Multiple alleles
True or False: Pedigrees are only used for recessive traits.
False
True or False: Skyy and Davaun's parents are both heterozygous for sickle cell disease.
True
What are homologous chromosomes?
When using a Punnett square, there are 4 combinations of gametes created. What do these 4 genoptypes represent?
Why is there a wide range of possible human eye colors?
Eye color in humans is a polygenic trait.
In a pedigree, both parents are not expressing a trait, but they have 1 offspring that is expressing the trait. How is this possible?
The trait is recessive and they are both carriers.
What is the mutation that causes sickle cell?
It is a mutation in the hemoglobin of red blood cells.