Non-Mendelian Traits Flashcard

Front

Non-Mendelian traits are traits that don't follow the basic rules of dominance and recessiveness. This includes:

Back

Incomplete

Answer explanation

Incomplete dominance is a non-Mendelian trait where the phenotype is a blend of the two parental traits, unlike simple dominance. This contrasts with codominance, polygenic inheritance, and multiple alleles, which also represent non-Mendelian patterns.

Front

Non-Mendelian traits are traits that don't follow the basic rules of dominance and recessiveness. This includes: __________ dominance

Back

Codominance

Answer explanation

Codominance is a non-Mendelian trait where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive. This distinguishes it from traditional dominance patterns.

Front

Non-Mendelian traits are traits that don't follow the basic rules of dominance and recessiveness. This includes: Multiple alleles, Incomplete dominance, Codominance, Polygenic inheritance.

Back

Multiple alleles

Answer explanation

Multiple alleles refer to the presence of more than two alleles for a trait, which leads to variations that do not fit simple dominant-recessive patterns. This is a key example of non-Mendelian inheritance.

Front

Non-Mendelian traits are traits that don't follow the basic rules of dominance and recessiveness. This includes:

Back

Polygenic

Answer explanation

Polygenic traits involve multiple genes and do not follow simple dominance patterns, making them non-Mendelian. In contrast, monogenic, autosomal, and dominant traits adhere to Mendelian inheritance rules.

Tags

NGSS.HS-LS4-3

Front

Non-Mendelian traits are traits that don't follow the basic rules of dominance and recessiveness. This includes:

Back

Epistasis

Answer explanation

Epistasis is a non-Mendelian trait where one gene can mask or modify the expression of another gene, thus not following simple dominance or recessiveness. Incomplete dominance, codominance, and multiple alleles still adhere to Mendelian principles.

Front

Think of incomplete dominance as __________; a compromise.

Back

Blending

Answer explanation

Incomplete dominance is best understood as 'blending' because it results in a mix of traits from both parents, rather than one trait dominating over the other. This compromise leads to a phenotype that is intermediate between the two.

Front

In this class, we will use all capital letters to indicate incompletely dominant alleles. In this example, the _______ is incompletely dominant over _______, so flowers with genotype RW have the phenotype _______.

Back

R, W, pink

Answer explanation

In this example, R (red) is incompletely dominant over W (white), resulting in RW genotype producing a pink phenotype. Therefore, the correct answer is R, W, pink.

Front

________ as two alleles sharing space; both phenotypes are partially seen.

Back

Codominance

Answer explanation

Codominance occurs when two alleles are expressed equally, resulting in both phenotypes being visible. This contrasts with incomplete dominance, where a blend of traits is seen. Thus, the correct answer is codominance.

Front

In our class we will indicate codominance by using capital letters for all traits, for example, ________ Options: RW, AB, XY, PQ

Back

RW

Answer explanation

In codominance, both alleles are expressed equally. The correct representation is RW, where R and W are both capital letters indicating that both traits are visible in the phenotype.

Front

This cow has genotype RW because she has a _______ gene and a _______ gene, and the alleles are codominant. Options: red, white; black, white; brown, black; yellow, red.

Back

red, white

Answer explanation

The cow's genotype RW indicates it has one red gene and one white gene. Since the alleles are codominant, both colors are expressed, making 'red' and 'white' the correct answer.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2