Genetics: Alleles and Chromosomes

Genetics: Alleles and Chromosomes

Assessment

Interactive Video

Biology, Science

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains the differences between alleles and chromosomes, focusing on dominant and recessive alleles. It begins with an introduction to cell structure and chromosomes, followed by a detailed explanation of karyotypes and homologous chromosomes. The concept of alleles is explored, highlighting genetic variation through homozygous and heterozygous conditions. The tutorial concludes with an understanding of dominant and recessive alleles, using examples like eye color to illustrate these genetic principles.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the most condensed form of genetic material visible during metaphase?

Gene

Chromosome

Nucleus

Allele

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many chromosomes are present in a typical human male karyotype?

44

23

46

22 pairs plus XY

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are homologous chromosomes?

Chromosomes with the same gene position and centromeric position

Chromosomes that are always identical

Chromosomes with different lengths

Chromosomes that do not pair during meiosis

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an allele?

A segment of DNA that codes for a protein

A different version of a gene

A type of cell

A type of chromosome

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

It has no alleles for a trait

It has more than two alleles for a trait

It has two identical alleles for a trait

It has two different alleles for a trait

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a diploid organism, how many alleles can a single trait have?

One

Two

Four

Three

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a dominant allele?

An allele that never expresses

An allele that can express with just one copy

An allele that is always recessive

An allele that requires two copies to express

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