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If a healthy young couple are both carriers of cystic fibrosis, the chance that each of their future children will inherit this serious illness is
The pea plant (Pisum sativum) is a good choice for studying heredity because it
is easy to control which plants mate with each other
If an individual is heterozygous for a particular trait
each parent contributed a different allele for that trait
If an individual is homozygous for a particular trait
each parent contributed the same allele for that trait
Recessive alleles seem to vanish in some generations and reappear in later ones due to
they are masked by a dominant allele
Any monohybrid cross consisting of one dominant and one recessive allele for the trait studied should result in a ratio of ______________ dominant to __________________ recessive.
A test cross is a mating of an individual with an unknown genotype and an individual that
is homozygous recessive
Two alleles of each gene are packaged into separate gametes and they move apart from each other during gamete formation summarizes Mendel's
law of segregation
A dihybrid cross is a mating between two individuals that are each ______________ for ___________ gene (genes).
Segregation of alleles for a gene on one chromosome that does not influence the segregation of alleles for a gene on another chromosome during meiosis is Mendel's
law of independent assortment
If the heterozygous phenotype is intermediate between the homozygotes, this is called
To inherit an autosomal dominant disorder a person could receive the disease causing allele from
the mother or the father
To inherit an autosomal recessive disorder requires the person receive the disease causing allele from
A person has a recessive allele for a disease but the allele is masked by the presence of a normal dominant allele in the person. This person
termed a carrier
If you cross two heterozygous (Yy) pea plants, what proportion of the offspring will be heterozygous?
If you cross two heterozygous Yy pea plants, what proportion of the offspring will be the dominant color yellow?
In an inherited form of high cholesterol, (HH) individuals have a blood cholesterol level greater than 500mg/dL, (RH) individuals are near 300mg/dL, and normal (RR) cholesterol levels should be less than 200mg/dL. The H allele is ___ to the R allele.
In cystic fibrosis, two unaffected carriers can have a child with the disease. It is as common in boys as in girls. This disease is
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