Bio Flashcards
(55 cards)
What is the main event of S phase?
DNA is replicated in preparation for a cell division
What does the Law of Segregation say?
The alleles for a trait will separate during formation of gametes and each gamete will only have one allele
Describe achondroplasia
An autosomal dominant disorder that causes dwarfism
What does autosomal refer too?
A non sex chromosome
Describe the heterozygous of a codominant trait
Will equally express both forms of the allele
Define epistasis
Refers to genes that mask the expression of other genes
Define pleiotropy
Used to describe a single gene that affects several phenotypes
Define polygenic
Means that a trait is a combination of many genes
Describe cystic fibrosis and its effects
An autosomal recessive trait characterized by excess mucus production that blocks lung passages
Describe brachydactyly
An autosomal dominant disorder that causes shortened fingers and toes
Describe albinism and its effects
An autosomal recessive trait that is characterized by the absence of the pigment melanin
Describe the heterozygous phenotype for incomplete dominance
Would be a blend between two expressions
When is a dihybrid cross used?
When two different traits are being crossed
Describe the term autosomal dominant
A person will have a condition as long as they have at least one dominant allele
What is the function of the stomata
Allows oxygen that is produced by photosynthesis to escape and that they allow carbon dioxide to be obtained
Which of the following is the function of rascular tissues in plants?
To transport chemicals and water throughout the plant
Which of the following are produced by the light reactions?
Oxygen, ATP, NADPH
What is the purpose of transcription?
Allows for the potions of DNA to be copied and transported from the cell to make proteins that help the cell function
What are the fragments making up the noncontinuous strand called?
Okazaki fragments
Which of the following make up the three steps of cellular respiration
Glycolysis, the kerbs cycle, electron transport chain
What did Rosalind Franklins research demonstrate?
DNA had a double-helical structure and sugar-phosphate backbone was on the outside while the bases were on the inside
What are the three molecules that make up a nucleotide
Phosphate, nitrogenous base, pentose sugar
What prevents each base from pairing with every other base?
Some bases make three bonds while other bases only capable of making two
Which of the following would bind together to form a single strand of DNA
Nucleotides