Dihybrid And Non-Mendelian Flashcard Review

Front

What is co-dominance in genetics?

Back

Co-dominance is a form of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive. Example: A roan cow with orange and white fur.

Front

What is the expected phenotype ratio when a roan (OW) cow and a roan (OW) steer mate?

Back

1 Orange : 2 Orange and White : 1 White.

Front

What is the phenotypic ratio when crossing a red flower (RR) with a speckled flower (RB)?

Back

2 Red : 2 Speckled.

Front

What is the probability of offspring having type O blood from two heterozygous type A blood parents (AO)?

Back

25%.

Front

What are the genotypes and phenotypes of offspring from crossing two pink (RW) flowers?

Back

50% Pink (RW); 25% White (WW); 25% Red (RR).

Front

What is the expected percentage of offspring with the TTYy allele combination when crossing TTYY with Ttyy?

Back

100%.

Front

Define phenotype in genetics.

Back

Phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

Define genotype in genetics.

Back

Genotype is the genetic constitution of an individual, specifically the alleles present at a particular gene locus.

Front

What is a Punnett square used for?

Back

A Punnett square is a diagram used to predict the genotypes of offspring from a genetic cross.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even in the presence of a recessive allele, while recessive alleles only express their trait when two copies are present.