DNA
Punnett Squares 1
Probability
Genetics
Punnett Squares 2
100
Inherited traits are passed down from our parents to us, their offspring, by the information that is coded in our parents'__________.
chromosomes
100
What % of offspring will be recessive?
25%
100
In horses, black (B) is the dominant color; brown (b) is the recessive color. Cross two heterozygous black horse parents.
What is the probability that these two horses will have a child that is brown?
25% brown (bb)
75% black
100
Using the letter H, write the genotypes for heterozygous, homozygous recessive and homozygous dominant.
heterozygous- Hh
homozygous recessive- hh
homozygous dominant- HH
100
In pole beans, green pods (G) are a dominant trait, while yellow pods (g) are a recessive trait. A bean plant with a (GG) genotype is crossed with a second plant that has the (gg) genotype. If this cross produces 500 offspring, approximately how many of the offspring will have yellow pods?
0 yellow
200
In what organelle is the DNA stored?
nucleus
200
What percent are heterozygous?
50%
200
This black dog has the genotype of (BB) for fur color. The black dog mates and has puppies with a solid white dog. The white dog has the genotype (bb).
What is the probability that this match will produce puppies that are black?
100% black puppies
0% white
200
What is a purebred?
Organism that has a genotype of homozygous dominant or homozygous recessive.
200
In pole beans, green pods (G) are a dominant trait, while yellow pods (g) are a recessive trait. A bean plant with a GG genotype is crossed with a second plant that has the gg genotype. If this cross produces 100 offspring, approximately how many of the offspring will have green pods?
100 green
300
A section of DNA that codes for a specific trait is called what?
a gene
300
What % are purebread (homozygous) dominant?
RR - 25%
300
What genotypes express the dominant form of a trait?
HH- homozygous dominant
Hh- heterozygous
300
Suppose a mother carries two recessive genes for freckles (rr) and a father carries one recessive gene for freckles and one dominant gene for clear facial skin (Rr). What is the likelihood that their first child will have freckles?
50% (ff) freckles
300
Brown rabbits have the genotype BB or Bb. White rabbits have the genotype bb.
If two heterozygous brown rabbits have baby rabbits, what is the probability that the baby rabbits will also be brown?
75% brown
400
The genetic material of all living things
DNA
400
what % of offspring will express the dominant trait in their phenotype?
75%
400
In rabbits, B represents the allele for black coat and b represents the allele for white coat. Black is dominant over white. If a rabbit has the genotype Bb, what is the rabbit's phenotype?
black
400
Suppose a mother carries two recessive genes for freckles (rr) and a father carries one recessive gene for freckles and one dominant gene for clear facial skin (Rr). What is the likelihood that their first child will NOT have freckles?
50%
400
What does it mean to be purebred?
Either both Capital Letters (BB) or both recessive (bb)
500
DNA contains genes that are passed from _________ to _________.
from parent to offspring
500
What are the genotypes of the parents?
Rr
500
In rabbits, B represents the allele for black coat and b represents the allele for white coat. Black is dominant over white. If a rabbit has the genotype bb, what is the rabbit's phenotype?
white
500
What is a hybrid?
Hybrid means one dominant allele and one recessive allele.
Example: Bb
500
What is the probaility of the offspings if one parent is recessive white fur and the other parent is heterozygous brown fur.
50% white, bb
50% brown, Bb