Producing Diversity In Offspring
Producing Diversity In Offspring
Mistakes In Meiosis
Genotype and Phenotype
Genotype and Phenotype
100
Differences in alleles that exist among individuals in a population.
What is genetic variation
100
Gametes combine without regard to the alleles they carry.
What is random fertilization
100
The failure of the sister chromatids or homologues to separte during meiosis. Too many or too few chromosomes can result from this.
What is nondisjunction
100
Genetic makeup of an individual.
What is genotype
100
An individual who carries two copies of the same allele.
What is homozygous
200
Three types of genetic variation.
What is independent assortment, random fertilization, crossing over.
200
One egg (8 million) x One sperm (8 million) =?
What is 64 trillion combinations in random fertilization
200
Presence of an extra chromosome.
What is trisomy
200
Expressed traits of an individual.
What is phenotype
200
RR alelles would be an example of what?
What is homozygous
300
Alternate versions of the same gene, produced by mutations.
What is alleles (R or r)
300
Exchange of genetic material between homologous pairs.
What is cross over
300
Trisomy 21
What is down syndrome
300
Code for the phenotype.
What is genotype
300
Are so named because their effects are seen even when a recessive allele is present.
What is dominant allele
400
The separation of homologous pairs of chromosomes into gametes independently of one another during meiosis.
What is independent assortment
400
When does cross over occur?
What is during prophase 1 of meiosis 1.
400
Down syndrome increases with what?
What is maternal age
400
Purple flowers are and example of what?
What is phenotype
400
Does not affect organism's phenotype unless no dominant alleles are present. (r)
What is recessive allele
500
Independent assortment has how many different combinations?
What is 8 million (2^23=8 million)
500
Results in combinations different from parents'.
What is recombinant
500
Where does down syndrome occur?
What is mother's egg
500
Having two different alleles for a gene. (Rr)
What is heterozygous
500
Codes for a nonfunctional protein.
What is recessive allele
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