Genetics

Front

What is a homozygous recessive allele?

Back

An allele that has two identical recessive genes, represented as 'tt'.

Front

What are alleles?

Back

Different forms of a trait that a gene may have, such as R, r, T, t.

Front

What is a genotype?

Back

The two-letter genetic code of an organism, indicating the alleles present.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup (e.g., TT, Tt, tt), while phenotype refers to the physical appearance of the organism.

Front

What is the probability of having heterozygous offspring from a cross?

Back

50%.

Tags

NGSS.HS-LS3-3

Front

What is heredity?

Back

The passing of traits from parents to offspring.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is the role of chromosomes in genetics?

Back

Chromosomes carry genes, which are the units of heredity.

Tags

NGSS.HS-LS3-1

Front

What is a dominant allele?

Back

An allele that expresses its trait even when only one copy is present (e.g., T in Tt).

Front

What is a recessive allele?

Back

An allele that only expresses its trait when two copies are present (e.g., tt).

Front

What is the significance of Punnett squares?

Back

Punnett squares are used to predict the genetic outcomes of a cross between two organisms.