Genes and Alles
What does DNA stand for? - ANSWERdeoxyribonucleic acid
Humans have blank pairs of homologous chromosomes - ANSWER23
Allele - ANSWERDifferent forms of a gene
Homozygous - ANSWERAn organism that has two identical alleles for a trait
Heterozygous - ANSWERAn organism that has two different alleles for a trait
dominate, recessive - ANSWERin heterozygous individuals, some alleles will always be
expressed (dominate) while others will not (recessive) when paired together
Dominant - ANSWERDescribes a trait that covers over, or dominates, another form of
that trait. (one needed)
Recessive - ANSWERtrait of an organism that can be masked by the dominant form of
a trait. ( two needed)
Genotype - ANSWERgenetic makeup of an organism
test cross - ANSWERthe crossing of an individual of unknown genotype with a
homozygous recessive individual to determine the unknown genotype
test cross - ANSWER
monohybrid cross - ANSWERA cross between individuals that involves one pair of
contrasting traits
Punnett Square - ANSWERA chart that shows all the possible combinations of alleles
that can result from a genetic cross
law of segergation - ANSWERstates that members of each pair of alleles seperate
when gametes are formed.
law of independent assortment - ANSWERthe law that states that genes separate
independently of one another in meiosis
What does DNA stand for? - ANSWERdeoxyribonucleic acid
Humans have blank pairs of homologous chromosomes - ANSWER23
Allele - ANSWERDifferent forms of a gene
Homozygous - ANSWERAn organism that has two identical alleles for a trait
Heterozygous - ANSWERAn organism that has two different alleles for a trait
dominate, recessive - ANSWERin heterozygous individuals, some alleles will always be
expressed (dominate) while others will not (recessive) when paired together
Dominant - ANSWERDescribes a trait that covers over, or dominates, another form of
that trait. (one needed)
Recessive - ANSWERtrait of an organism that can be masked by the dominant form of
a trait. ( two needed)
Genotype - ANSWERgenetic makeup of an organism
test cross - ANSWERthe crossing of an individual of unknown genotype with a
homozygous recessive individual to determine the unknown genotype
test cross - ANSWER
monohybrid cross - ANSWERA cross between individuals that involves one pair of
contrasting traits
Punnett Square - ANSWERA chart that shows all the possible combinations of alleles
that can result from a genetic cross
law of segergation - ANSWERstates that members of each pair of alleles seperate
when gametes are formed.
law of independent assortment - ANSWERthe law that states that genes separate
independently of one another in meiosis
