BIO FINAL CH 9

A monohybrid cross is...

a breeding experiment in which the parental varieties differ in onlyone character

A testcross is...

a mating between an individual of unknown genotype and an individual homozygous recessive for the trait of interest

What is false about genotypes and phenotypes?

an organism with two different alleles for a single trait is said to be homozygous for that trait

AB blood illustrates...

codominance

Mendel's law of independent assortment states that...

each pair of alleles segregates independently of the other pairs of alleles during gamete formation

A carrier of a genetic disorder who does not show symptoms is most likely to be ( ) to transmit it to offspring.

heterozygous for the trait and able

Amniocentesis and chorionic villus sampling allow for ( ) and ( ) of the fetus so that it can be tested for abnormalities.

karyotyping . . . biochemical testing

Most people afflicted with recessive disorders are born to parents who were...

not affected at all by the disease

How many sex chromosomes are in a human gamete?

one

Mendel conducted his most memorable experiments on...

peas

The chromosome theory of inheritance states that..

the behavior of chromosomes during meiosis and fertilization accounts for patterns of inheritance

The alleles of a gene are found at ( ) chromosomes.

the same locus on homologous

Varieties of plants in which self-fertilization produces offspring that are identical to the parents are referred to as...

true-breeding