Ch6.7 Genes, Chromsomes, Genotypes & Phenotypes
an alternative form of a gene.
allele
Graphical representation showing the genetic relationships within a family for a specific trait.
Pedigree
Ecological relationship where one organism benefits and the other is unaffected.
Commensalism
Variable that is changed.
Independent variable
Aiming to improve the conditions of others through generosity, charity and kindness
Beneficence
Chromosomes have a centromere in the middle
Metacentric
Mode of inheritance: All sons of affected females are affected
X-linked recessive
a species that has a significant influence on the ecosystem in which is lives, relative
Keystone species
Variable that is measured in an experiment.
Ethical Approach: Which acton would a good person choose?
Virtues-based approach
Process where chromosomes fail to separate during anaphase of meiosis
Non-disjunction
A cross involving the alleles of just one gene
Monohybrid cross.
Name a density-dependent factor that affects population size.
- Competition
- Predation
- Parasitism & disease.
variable that remains unchanged or held constant to prevent its effects on the outcome
Control variables.
Ethical concept - being honest, trustworthy and keeping your word
Integrity
When a heterozygote genotype produces a phenotype that 'co-exists' from both the parents.
Co-dominance.
The type of cross when mating an unknown genotypic individual with a known homozygous recessive.
Test crosses can be used to determine whether a dominant phenotype is homozygous or heterozygous
Female cane toads drop their eggs into the pond for fertilisation.
What reproductive strategies?
r-selective species.
an experiment is .............. if the only variable that is changed is the independent (i.e. all other variables are controlled = the same in each set up)
Valid experiment
Ethical concept for the equal distributon of benefits, risks, costs and resources
Justice
changes in gene expression without altering the DNA sequence.
epigenetics.
Mode of inheritance - Males with the trait pass it on to all daughters and no sons
What function do plants play in a ecosystem?
When multiple measurements of the same investigation are close to each other.
Precision.
Considering the wellbeing, freedom, independence, value and beliefs of all people
Respect