biology 111 chapter 10

the person who made the most lasting impression on the science of genetics is
Gregor Mender

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
25%

A portion of DNA that encodes a specific protein is
a gene

Alternate forms of the same gene are called
alleles

In humans, alleles are inherited from
males and females(two alleles from each parent)

All gametes contain
one set of chromosome

The pea plant (Pisum sativum) is a good choice for studying heredity because it
is easy to control which plants mate with each other

Mendel called a masking trait
dominant

Sorry, but full essay samples are available only for registered users

Choose a Membership Plan
col-lg-5 central-block">Mendel called a trait that is masked
recessive

An allele that exerts its effects whenever it is present is
dominant

If the two alleles for a particular gene are identical the gene pair is
homozygous

If the two alleles for a particular gene are different the gene pair is
heterozygous

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

Genotype means
the combination of alleles in an individual

Phenotype means
the observable expression of the genes in an individual

The most common or “normal” phenotype or allele for a gene in a population is the
a wild type

In the study of genetics the offspring of the P generation is referred to as the
F1 generation

A pea plant with (Tt) as its genotype should be referred to as
heterozygous

A monohybrid cross is a mating between two individuals that are both
heterozygous for one gene

Any monohybrid cross consisting of one dominant and one recessive allele for the trait studied should result in a ratio of ______________ dominant to __________________ recessive.
three, one

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).
heterozygous, two

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

In the ABO blood type system the alleles IA, IB and i produce
four phenotypes

In the ABO blood type system, the IA allele is _____ with the IB allele.
codominant

If the heterozygous phenotype is intermediate between the homozygotes, this is called
incomplete dominance

Autosomes
a non sex chromosome

Linked genes, by definition, are genes that
are found on the same chromosome

Crossing over is more likely to separate genes on a chromosome if they are
far apart

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
both parents

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

Diagrams depicting family relationships and phenotypes for a genetic disorder are
pedigree charts

The chromosome that determines human gender is
the Y chromosomes

Hemophilia A is caused by
an X linked recessive disorder causing a defective blood clotting protein

Homologous chromosomes have
7 pairs of homologous chromosomes

A single chromosome has
a single gene with a single allele

Yellow peas are an example of
phenotypr

Having the alleles Tt is
a genotype

If a pea plant is heterozygous for yellow seeds (Yy), which gametes will it produce?
Y or y

If a pea plant is homozygous recessive for yellow seeds (yy), which gametes will it produce?
y only

If a pea plant is homozygous for yellow seeds (YY), which gametes will it produce?
Y only

If you cross two heterozygous (Yy) pea plants, what proportion of the offspring will be heterozygous?
50%

If you cross two heterozygous Yy pea plants, what proportion of the offspring will be the dominant color yellow?
75%

Which gametes can a RrYy plant produce?
RY, Ry,rY,ry

Which gametes can a RRyy plant produce?
RR or yy

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.
codominant

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
autosomal recessive

The wide variation in skin color in humans is best explained by
skin color is a polygenic trait

Which has the following in order from smallest to largest
DNA nucleotides, gene, chromosome, cell

Which of the following is in the correct order?
meiosis of diploid cell, haploid gametes produced, fertilization, new diploid organism formed

Tagged In :

Get help with your homework


image
Haven't found the Essay You Want? Get your custom essay sample For Only $13.90/page

Sarah from studyhippoHi there, would you like to get such a paper? How about receiving a customized one?

Check it out