Brown eyes are dominant to blue eyes. Both of Donna's parents have brown eyes, but Donna has blue eyes. What is the BEST explanation for why Donna has blue eyes?
Both of Donna's parents carry a gene for blue eyes.
All of Donna's grandparents must have had blue eyes.
Donna's father probably carries the gene for blue eyes.
Donna's father probably carries the gene for blue eyes.
The type of inheritance where the dominant trait does NOT fully over power the recessive trait in a heterozygous genotype. The heterozygous trait is the blending of the two traits.
polygenic inheritance
codominat inheritance
multiple allele
incomplete dominance
What is the type of inheritance with no recessive alleles? Hint:both alleles are dominat
codominance
incomplete dominance
Mike and his three brothers all have brown hair. Mike's father has brown hair, too. Mike's mother, however, is the only family member that has red hair color. What conclusion can you draw about the gene for hair color?
Red and brown genes are co-dominant.
The gene for red hair is dominant over the gene for brown hair.
The gene for brown hair is dominant over the gene for red hair.
Neither brown nor red are dominant since they both occur in the same family.
How many chromosomes are present in the human cell nucleus?
23 chromosomes or 46 pairs
46 pairs or 92 chromosomes
46 chromosomes or 23 pairs
32 chromosomes or 16 pairs
Traits that hide other traits when passed on to offspring are called __________________
_______________.
recessive trait
dominant trait
heredity
aquired trait
_________________ is the transfer of traits from one generation to another generation.
recessive trait
dominant trait
acquired trait
heredity
_________________ ______________ is a learned trait and is not genetically passed down
to offspring.
recessive trait
dominant trait
heredity
acquired trait
__________________ _____________ shows its specific trait when both parents pass the
gene to the child.
recessive trait
dominant trait
heredity
acquired traits
Inheretid traits is a characteristic or features of one organism that are
passed from parent to offspring.
True
False
A yellow flowered plant (YY) breeds with a red flowered plant (RR). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (YR) flowers?
0
25
50
100
What kind of dominance is exhibited by the cat below?
incomplete dominance
codominance
multiple alleles
polygenic inheritance
Use the punnett square to answer.
What is the probability of having a child with attached earlobes?
25%
50%
75%
100%
Snapdragons are genetically diverse type of flowers. When red (R) and white (W) snapdragons are crossed, they result in a pink variety. If two pink snapdragons are crossed, what are the possible genotypes of the offspring ?
RR
RW
WW
PR
PP
rr
Sickle Cell Anemia is condition that shows codominance. The genotype for normal blood cells is NN. Sickle cell trait is the heterozygous condition (NS) and contains both normal and sickle shaped blood cells. Sickle cell disease (SS) is when all of the blood cells are sickle-shaped and has lifelong medical implications. A man with sickle cell trait has a child with a woman with sickle cell trait.What is the probability of having a child with sickle cell trait?