Chromosomes
These are chromosome pairs that carry the same genes but may have different alleles.
What are homologous chromosomes?
The stage where homologous chromosomes separate.
What is Anaphase I?
The original source of new alleles in a population.
What are mutations?
Long-haired dogs are recessive. A long-haired dog must have this genotype.
What is ll?
Blood type O genotype
What is ii?
Identical copies of a chromosome joined at the centromere.
What are sister chromatids?
The stage where sister chromatids separate in meiosis.
What is Anaphase II?
Random separation of homologous chromosomes during meiosis I.
What is independent assortment?
Recessive allele is expressed only when this genotype is present.
What is homozygous recessive?
Blood type AB genotype.
What is IAIB?
The location of a gene on a chromosome.
What is a locus?
The final ploidy of cells produced by meiosis.
What is haploid (n)?
Exchange of DNA between homologous chromosomes.
What is crossing over?
A square used to predict offspring genotypes.
What is a Punnett square?
Can an AB parent have an O child?
What is No?
The ends of chromosomes that protect DNA.
What are telomeres?
Crossing over occurs during this stage of meiosis.
What is Prophase I?
When gametes combine randomly during fertilization.
What is random fertilization?
If a cross produces a 1:1 ratio, one parent is heterozygous and the other is this.
What is homozygous recessive?
Huntington’s disease is this type of allele.
What is dominant?
The region where spindle fibers attach to chromosomes.
What is the kinetochore?
The pairing of homologous chromosomes is called this.
What is synapsis?
Name the three main ways sexual reproduction increases genetic variation.
Crossing over, Independent assortment, Random fertilization
The cross Ll × ll produces what phenotype ratio, if long hair is recessive?
What is 1 short-haired : 1 long-haired?
Possible genotypes for someone with Huntington’s disease.
What are HH or Hh?