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Biology Unit 7

MAA Biology U7

QuestionAnswer
Mendel's first law alleles segregate from one another during the formation of gametes.
A DNA molecule contains information for the construction of proteins.
nitrogen based sequence the structure in DNA that apparently serves the source of coded information
mutation changes in the base of a nucleotide
"crossing over" the process in which parts of chromatids are exchanged
gene the basic inheritance unit of life
meiosis occurs during both spermatogenesis and oogenesis
incomplete dominance when you cross a red phenotype and a white phenotype and the resulting offspring are pink
ex. of recessive alleles bb
ex. of phenotype ratio 3:1
ex. of dominant "pure breed" BB
ex. of hybrid Bb
ex. of genotype ratio 1:2:1
A-B-O blood groups trait controlled by multiple alleles
sickle-cell trait trait due to incompletely dominant genes in a heterozygous state
hemophilia trait due to sex-linked recessive gene
Turner's syndrome trait due to genotype XO
Down's syndrome trait due to trisomy of chromosome 21
Created by: scartwright
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