Chapter 16 Flashcards
What theory is the “accepted” theory of heredity?
Particulate Theory of Heredity
Name an early theory of heredity that turned out to be false.
Blended Theory
What is the phenotypic ratio of dominant to recessive of a monohybrid cross?
3:1
What refers to the contrasting form of genes?
Alleles
What is the genotypic ratio (monohybrid cross) of homozygous dominant to heterozygous to homozygous recessive?
1:2:1
A segment of DNA that encodes for a specific amino acid sequence.
Gene
A gene is located on a specific ____ of a _____.
locus; chromosome
What type of plant, when bred, always produced the same traits as the parents?
True breeding
“P” refers to ______ generation
Parent
4 Laws
- Dominance 2. Independent Assortment 3. Parental equivalence 4. Segregation
How many alleles does an offspring receive from each parent?
1
Law of Segregation
2 alleles for a trait are packaged into separate gametes
Law of Parental Equivalence
The sex of the parent does not influence which allele will be dominant/recessive in offspring.
Law of Independent Assortment
Each pair of alleles separate into gametes independently.
Phenotypic ratio of dihybrid cross
9:3:3:1
Which mode of inheritance? Male of first generation and all male offspring after.
Y-chromosome
Which mode of inheritance? Some male offspring and no females.
X-chromosome linked
Which mode of inheritance? Parent generation and some males/females of subsequent generations.
Dominant Autosomal
Which mode of inheritance? Afflict parental generation and some males/females of later generations (can skip generations).
Recessive Autosomal
