What is the probability the offspring will be homozygous dominant?
Homozygous dominant: 25% or 0.25. Heterozygous: 50% or 0.50. 11. If two heterozygotes are crossed, the probability that an offspring will show the dominant trait is 75% or 0.75.
What are the probabilities for the offspring between a homozygous dominant parent and a heterozygous parent?
For example, if one parent is homozygous dominant (WW) and the other is homozygous recessive (ww), then all their offspring will be heterozygous (Ww) and possess a widow’s peak. If both parents are heterozygous (Ww), there is a 75% chance that any one of their offspring will have a widow’s peak (see figure).
What is the offspring of homozygous?
One allele for every gene in an organism is inherited from each of that organism’s parents. In some cases, both parents provide the same allele of a given gene, and the offspring is referred to as homozygous (“homo” meaning “same”) for that allele.
What is phenotype example?
Examples of phenotypes include height, wing length, and hair color. Phenotypes also include observable characteristics that can be measured in the laboratory, such as levels of hormones or blood cells.
How can you tell if someone is heterozygous or homozygous for a trait that is dominant?
If the test cross results in any recessive offspring, then the parent organism is heterozygous for the allele in question. If the test cross results in only phenotypically dominant offspring, then the parent organism is homozygous dominant for the allele in question.
What is an example of heterozygous?
Your genes are made of DNA. … If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair.
What is the ratio of the offspring that are homozygous to the total number of offspring?
The ratio is 2:2, which is the same as 1:1. 2) For homozygous alleles, you can either have homozygous dominant or recessive.
What is the probability that the offspring will be female?
Human Genetics Study Guide
|In humans, a male has||one X chromosome and one Y chromosome|
|Human females produce egg cells that have||one X chromosome|
|what is the approximate probability that a human offspring will be female?||50%|
|what percentage of human sperm cells carry an X chromosome?||50%|