Post Test L2 Flashcards
According to Mendel’s experiments, the dominant trait will result in about ______________ of the offsprings in the second generation.
Three-quarters
An offspring’s observable traits are called its ____________________ while its genetic material is referred to as _________________.
phenotype, genotype
A single trait is controlled by two expressions of the same gene called _________________
Alleles
Egg and sperm cells are also called ______________ , and each contains half the usual number of chromosomes.
gametes
During fertilization, the resulting ______________ contains a full set of chromosomes.
Zygote
The four nucleotide bases in DNA are adenine, thymine, cytosine, and ______________.
guanine
Accidental errors in individual genes are called ______________ .
mutations
______________ are stretches of DNA that control the process of gene expression.
Promoters
______________ mechanisms such as DNA methylation and histone remodeling may control genes.
Epigenetic
The shape of DNA can be influenced by the change of shape of the adjacent ______________.
histones
. All chromosomes except ______________ chromosomes come in matched pairs.
Sex
The first phase of gene expression involves the transcription of DNA to RNA, and the second phase
involves the ______________ of RNA base-sequence code into a sequence of amino acids.
translation
The Human Genome Project discovered that only ______________ percent of human DNA contains protein-encoding genes.
1
