Download Genetics Vocabulary

Genetics Vocabulary
Word Bank:
different two
code
both
cross
offspring
number
trait
genes
physical
neither
progeny
prevents events
homozygous
ABO
expresses single many
combinations
identical
gamete
producing independently
1. Hybrid - An organism that has two
alleles
for a trait.
2. Dominant - An allele whose trait always shows up in the
organism when it is present.
3. Gene - The set of information that controls a trait;
in the DNA.
4. Alleles - The different forms of a gene.
5. Heredity - The passing of traits from parents to
.
6. Purebred - The offspring of many generations that have the
same traits.
7. Trait - A characteristic that an organism can pass to offspring
through
.
8. Genetics - The scientific study of heredity. 9. Probability - A
that an event will occur.
that describes how likely it is
10. Phenotype - An organism's
appearance or
visible traits.
11. Recessive - An allele that is masked when a dominant allele
is present.
12. Codominance - A condition in which the two alleles of a
gene are
dominant nor recessive.
13. Heterozygous - Having
different alleles for a
trait.
14. Genotype - An organism's genetic makeup or allele
.
15. Punnett Square - A chart that shows the possible
combinations of alleles that result from a genetic
.
16. Homozygous - Having two
trait.
17. Homozygous Dominant - When
alleles for a
alleles
are for the dominant trait.
18. Homozygous Recessive - When both alleles are for the
recessive
.
19. Law of Segregation - During
formation the
pairs of genes responsible for each trait segregate so that each
gamete contains only one gene for that trait.
20. Backcross - The cross of a
with one of
it's parents.
21. Test Cross - The organism having the dominant phenotype
is crossed with one having a recessive phenotype. This is done
to see if the dominant phenotype is
or
heterozygous.
22. Complete Dominance - One of the alleles
itself over the other allele.
23. Incomplete dominance - Expression of heterozygous alleles
differ from those of the parents
distinguishable hybrids.
24. Law of Independent Assortment - Alleles segregate
during gamete formation.
25. Law of Dominance - One form of a heredity trait, the
dominant trait, dominates or
the
expression of the recessive trait.
26. Multiple Alleles - Three or more alternate genes which can
be at one site at different times giving different phenotypes, such
as
genes for blood.
27. Multiple Genes - Crosses in which many genes may affect a
trait.
28. Nondisjunction - Failure of homologous chromosomes to
segregate properly.
29. Gene linkage - When
genes are on
the same chromosome.
30. Product rule - The probability of two or more
at the same time is the product of
their individual probabilities.