Genetics 1
Are the characteristics of an organism.
What are traits?
The stage where homologous chromosomes pair up and crossing over occurs
Prophase 1
A variation of a gene
What is an allele?
Where are chromosomes located?
What is the nucleus?
This is produced by meiosis
What are gametes?
The passing of traits from parent to offspring is called.
What is heredity?
Organisms have two of the same genes (TT, tt)
What is homozygous?
What is a phenotype?
What an organism looks like?
Organisms have two different genes for the same trait (Tt).
what is heterozygous?
The two processes that increase genetic variation during meiosis.
What are crossing over and independent assortment?
This gene always shows its self over a recessive gene
What is a dominant gene?
Shows possible gene combinations.
What is a Punnett square?
Chromosomes are made up of _______ which contain sugars, phosphates, and four nitrogen bases.
What is DNA?
All human cells contain ____ TOTAL number of chromosomes
What is 46?
The number of chromosomes in a gamete after meiosis.
What is 23, half the normal amount?
a trait that is hidden when the dominant gene is present
What is a recessive trait?
The inheritance pattern of blood types (A, B, AB, O)
What is codominance (and multiple alleles)?
In incomplete dominance, the phenotype is this between parents
What is blended/intermediate?
Give an example of a homozygous dominant genotype.
TT, BB (2 capital letters)
The study of heredity is called-
What is genetics?
What percent of the offspring of heterozygous parents will be homozygous recessive?
What is 25%?
What percent of offspring will have the dominant trait?
What is 75%?
What percent of the offspring of heterozygous parent will be homozygous?
What is 50%?
Why males are more likely to express X-linked recessive traits
What is they only have one X chromosome?
What percentage of two homozygous dominant parents will be heterozygous?
What is zero percent?