Heredity

Multiple Choice

Alternate form of genes are called?

• Chromosomes

• Alleles

• Dominants

• Recessive

Heredity is the transfer of trait from parents to offspring. Traits are transferred through genes. 2 genes are inherited, 1 from each parent. The inherited genes both controls a specific trait. For that matter they are called Alleles. Alleles are alternate form of genes that controls specific trait.

​Read this carefully for the next questions.

Multiple Select

Which of the following traits can be inherited?

• Height

• good manners

• blood type

• neatness

Multiple Choice

The two forms of genes that controls a specific character are called alleles?

• True

• False

Multiple Choice

The basic unit of heredity is called?

• Trait

• gene

• allele

• chromosome

Alleles are represented with two alphabets. The one capital letter(B) is called the dominant gene/allele. The other one in lowercase(b) is called recessive gene/allele. The dominant gene is always written before the recessive gene. Example Bb

1. Dominant & Recessive

​Remember that the dominant gene always blocks the recessive gene. In the above example, Brown eye B is dominant over recessive blue eye b, so both parents are Bb, but they have brown eye because of the presence of dominant B for brown eye.

If babies are formed between the two
BB = Brown eye (dominant genes)
Bb = Brown eye (dominant block recessive)
bb = Blue eye ( no dominant present)

Multiple Choice

Which of the genes is dominant?

• b

• B

• none

Drag and Drop

Among the alleles, the ​

Placeholder

always blocks the ​

Placeholder

.​

Drag these tiles and drop them in the correct blank above

dominant

recessive

chromosome

DNA

Multiple Choice

When a dominant gene B for brown eye and a recessive gene b for blue eyes meet in an offspring. The baby will have a ................................... eyes.

• Blue

• Brown

• Mixture of both brown & blue

Multiple Select

The correct order to write alleles is?

• B & B

• Bb

• bb

• bB