Punnett Squares and Genetic Crosses

Punnett Squares and Genetic Crosses

Assessment

Interactive Video

Biology, Science, Chemistry

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial introduces Punnett squares as a tool in genetics to solve genetic problems. It explains how to use Punnett squares for predicting offspring traits and deducing parent genotypes, using examples of heterozygote crosses and dihybrid crosses. The tutorial also covers Mendel's law of segregation and provides a step-by-step guide to constructing and interpreting Punnett squares.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of a Punnett square in genetics?

To predict environmental adaptations

To determine the lifespan of organisms

To graphically solve genetic problems

To calculate the exact number of offspring

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a Punnett square, where are the gametes of the parents placed?

Inside the square

On the outside of the square

In the center of the square

At the bottom of the square

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the genotype of a heterozygous individual for tongue rolling?

Big R Big R

Little r Little r

Big R Little r

Little r Big R

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many offspring can two heterozygous parents produce in a single gene cross?

Two

Three

Four

Five

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the phenotype of an individual with a homozygous recessive genotype for tongue rolling?

Can roll tongue

Cannot roll tongue

Partially roll tongue

Rolls tongue occasionally

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If half of the offspring cannot roll their tongue, what can be inferred about the parents?

Both are homozygous dominant

One is heterozygous, the other is homozygous recessive

Both are homozygous recessive

Both are heterozygous

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of placing the dominant allele first in a genotype?

It affects the phenotype

It is a convention for clarity

It changes the genetic makeup

It is required by Mendel's laws

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