Free Printable The Genome & Chromosomes

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The Genome & Chromosomes

Total questions: 10

Worksheet time: 8mins

Name

Class

Date

At conception, your mother contributed a gene that encoded for the sickle hemoglobin (hemoglobin S), while your father contributed the same gene that encoded for normal hemoglobin (hemoglobin A). Which of the following denotes the DNA structures which carry these variants?

Homologs, chromatids, and homologous chromosomes

Homologs and homologous chromosomes.

A mutation occurs on a chromosome in a sperm gamete. Which of the following might explain why diploidy may prevent some of the offspring from developing a disease associated with this mutation?

Only one homologous chromosome has the mutation (the sperm) but not the other (the egg) so the normal genes are present.

It is always necessary for both homologous chromosomes to have the defective gene in order for the disease to develop.

Choose the smallest correct answer. In general, the loss of ____ chromosome(s) is usually considered a lethal event.

If the diploid chromosome count in humans is 46, how many pairs of homologous chromosomes are there?

A rabbit is a diploid organism. Its egg cell has 22 chromosomes. How many chromosomes can be found in a rabbit's neuron cell?

We've learned today that the (a) is the name that we give to the (b) content of the cell. DNA is organized into (c) . Think of it as if the information in the genome are like recipes, the recipes are organized into (d) (aka the chromosomes), and those chromosomes are stored in the (e) , or the library.

Choose from the below words

genome

DNA

chromosomes

cookbooks

nucleus

Chromosomes are basically distinct collections of (a) in the genome. We have different versions of each chromosome and these are called (b) , or homologs. Both mom and dad are contributing one homologous chromosome to the new cell and we can refer to the chromosome complement of these (c) - or the egg and sperm that mom and dad are donating - as having a (d) complement of chromosomes, and this is abbreviated as ' (e) '.

Choose from the below words

DNA

homologous chromosomes

gametes

haploid

Human have (a) chromosomes in their (b) , or n=23. When those two gametes fuse, this is called (c) . In other words, you have two (d) sets of chromosomes and this is abbreviated ' (e) .' So 2n=46.

Choose from the below words

gametes

diploid complement

haploid

Examine the image: the cell on the right is

haploid

diploid

10.

A cell that has a half set of chromosomes is called a______ cell.

haploid

diploid

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The Genome & Chromosomes

Total questions: 10

Worksheet time: 8mins

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