- What is the probability of having a child with recessive trait if both parents are heterozygous for the trait?
- What is the probability of the parents having a child who is homozygous dominant for this trait?
- What is the probability that two heterozygous parents will have a heterozygous child?
- What is another term for homozygous?
- What is the difference between homologous and heterologous chromosomes?
- What letters are used to represent dominant and recessive alleles?
- What type of letter represents a recessive allele?
- What do we call it when someone inherits two of the same gene?

## What is the probability of having a child with recessive trait if both parents are heterozygous for the trait?

The Punnett square below makes it clear that at each birth, there will be a 25% chance of you having a normal homozygous (AA) child, a 50% chance of a healthy heterozygous (Aa) carrier child like you and your mate, and a 25% chance of a homozygous recessive (aa) child who probably will eventually die from this …

## What is the probability of the parents having a child who is homozygous dominant for this trait?

There is a 50% chance that the children will be heterozygous (Aa) and a 25% chance that they will be homozygous dominant (AA). Children with either of these genotypes will have this trait expressed in their phenotypes.

## What is the probability that two heterozygous parents will have a heterozygous child?

The chance of either parent being a heterozygote is 1/4, as calculated above. Then, the probability that both parents are heterozygotes, and the probability that two heterozygotes will have a heterozygous child, is 1/4 x 1/4 x 1/2 = 1/32.

## What is another term for homozygous?

Genes come in pairs, called alleles, and each pair is located in a specific position (or locus) on a chromosome. If the two alleles at a locus are identical to each other, they are homozygous; if they are different from one another, they are heterozygous.

## What is the difference between homologous and heterologous chromosomes?

When chromosomes are homologous, it means that they are the same, at least in terms of the gene sequences and loci. Heterologous, in essence, means “different”. Homologous chromosomes have alleles on the same genes located in the same loci. Heterologous chromosomes have alleles on different genes.

## What letters are used to represent dominant and recessive alleles?

A capital letter represents the dominant form of a gene (allele), and a lowercase letter is the abbreviation for the recessive form of the gene (allele).

## What type of letter represents a recessive allele?

lowercase letter

## What do we call it when someone inherits two of the same gene?

homozygous