Vocab
transmission of traits from parents to offspring.
give an example of a homozygous dominant genotype
anything with two capital letters
the likelihood of a specific genetic trait being inherited by an offspring based on the alleles present in the parents is known as
probability
In a certain species of flower, flower color shows incomplete dominance.
The allele R produces red flowers.
The allele R' produces white flowers.
A heterozygous plant (RR') has pink flowers.
We cross two pink flowers.
What are the phenotypes of the offspring?
1 red, 2 pink, 1 white
What in the definition of genetics
science of heredity.
during reproduction, offspring that are the exact same as their parents is known as
true breeding
the type of inheritance that is one allele of a gene masks another allele, resulting in a dominant phenotype
In a species of chicken, feather color shows codominance.
The allele B produces black feathers.The allele b produces white feathers.A heterozygous chicken (Bb) has speckled feathers (both black and white feathers are visible).
Two speckled chickens are crossed.
What are the genotypes of their offspring.
1 BB, 2 Bb, 1 bb
flower pollinates another flower
This type of diagram is used to help determine the possible genotypes of parents and offspring
pedigree charts
the type of inheritance pattern that shows the phenotype of a heterozygote is a blend of the phenotypes of two homozygotes
incomplete dominance
In pea plants, tall height is dominant over short height.
T = tall, t = short
A heterozygous tall plant (Tt) is crossed with a short plant (tt). What are the chances (%) the offspring will be tall.
50 % chance
what is the definition of Genotype
combination of alleles for a certain trait.
In pea plants, the allele for tall height (T) is dominant over the allele for short height (t). If a heterozygous tall plant (Tt) is crossed with a short plant (tt), what are the possible phenotypes of the offspring.
2 tall and 2 short
inheritance pattern that shows two versions of a gene (allele) are expressed EQUALLY, resulting in the appearance of both traits in an individual
codominance
A mother is hetereozygous for type A with genotype
A father has blood type O with genotype.
Whare are the chances they have a child with type O
50%
what is the definition of phenotype
physical characteristics that the gene
In humans, brown eye color (B) is dominant over blue eye color (b). If two parents are both heterozygous for brown eyes (Bb), What is the expected ratio (as a ration) of each phenotype?
A mother has blood type A and a father has blood type B. Both parents are heterozygous for their blood types.
What are the phenotypes of their children?
1AB, 1A, 1B, 1O
In humans, dark hair is dominant over blonde hair.
D = dark hair (dominant), d = blonde hair (recessive)
Two parents both have dark hair, but are heterozygous (Dd). What are the odds they have a child with dark hair.
75%