Punnett Squares

Punnett Squares

Assessment

Flashcard

Biology

7th Grade

Hard

Created by

Wayground Content

FREE Resource

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16 questions

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1.

FLASHCARD QUESTION

Front

What is a Punnett Square used for?

Back

A Punnett Square is used to predict the genotypes and phenotypes of offspring from a genetic cross.

2.

FLASHCARD QUESTION

Front

What do the letters in a Punnett Square represent?

Back

The letters represent alleles, where uppercase letters denote dominant alleles and lowercase letters denote recessive alleles.

3.

FLASHCARD QUESTION

Front

If a plant has the genotype Rr, what are the possible gametes it can produce?

Back

The possible gametes are R and r.

4.

FLASHCARD QUESTION

Front

What is the phenotypic ratio of offspring from a cross between two heterozygous parents (Rr x Rr)?

Back

The phenotypic ratio is 3:1 (3 red-flowering plants to 1 white-flowering plant).

5.

FLASHCARD QUESTION

Front

What is the genotypic ratio of offspring from a cross between two heterozygous parents (Rr x Rr)?

Back

The genotypic ratio is 1:2:1 (1 RR : 2 Rr : 1 rr).

6.

FLASHCARD QUESTION

Front

What does it mean if an organism is homozygous for a trait?

Back

An organism is homozygous for a trait if it has two identical alleles for that trait (e.g., RR or rr).

7.

FLASHCARD QUESTION

Front

What does it mean if an organism is heterozygous for a trait?

Back

An organism is heterozygous for a trait if it has two different alleles for that trait (e.g., Rr).

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