4. Suppose that you had data for 20 families of four children each where both parents were heterozygous Aa. Would each of these families have exactly one albino child, as predicted by the Punnett square Explain why or why not. Y cu

Genes are the hereditary units, which carry information from the parent to offspring. The variant form of the gene, an allele codes for different traits, but is present at the same locus of the chromosome.

Given that:

The phenotypes of crawfish are long, medium, and short.

Parents have medium antennae.

The progeny have long and short antennae.

Let us assume the genotype as:

Let allele A be dominant that codes for long antennae.

Allele a is recessive and codes for short antennae.

The expression of three phenotypes suggests that the alleles are inherited through incomplete dominance.

Incomplete dominance is the phenomenon in which both the alleles will be expressed incompletely. The alleles for long and short will not be expressed properly, leading to medium-length antennae.

The expression can be given as:

AA - Long antennae

Aa - Medium Length antennae

aa - Short Length antennae

The cross for the given alleles is given in the attachment below.

Thus, F1 progeny will have 25 % purebred dominant for long antennae, 50% of the progeny will have heterozygous medium antennae, and 25% of the progeny will have purebred recessive short antennae.

To know more about the cross, refer to the following link:

Final answer:

Offspring trait variations, such as antennae length in crawfish, are a result of genetic recombination during sexual reproduction. Each parent contributes a set of chromosomes that contain genes for these traits.

Explanation:

The traits of offspring, like antennae length in crawfish, are determined by their parents' genes, which carry information for various physical characteristics. We see this in the diversity of freshwater crustaceans such as crawfish, where children may inherit different traits like short or long antennae.

Each parent crawfish contributes one set of chromosomes, which include genes for traits like antennae length. The actual trait an offspring exhibits, such as short or long antennae, depends on the combination of the alleles (versions of the gene) it receives from its parents. This is an example of Mendelian genetics and shows that although the parents may both have medium-length antennae, they carry alleles for other antenna lengths which can appear in their offspring.

For the offspring to have short or long antennae, one parent must have contributed the 'short' allele and the other the 'long' allele while both also carry the 'medium' allele. The combination of these alleles results in offspring with different antennae length traits due to the process known as genetic recombination during sexual reproduction.

Learn more about Genetic Traits in Crawfish here:

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Answer:

Animals and plants are associated with both divisions and phyla

As kingdom grows the more species are in the classifying group. 

And since there are only a number of kingdom and thousand species, it would account that species changes more rapidly and exponentially grows than kingdoms.

Explanation:

well, or the trees, there are lots of those kinds of trees everywere because the seeds spread everywere so now trees are everwere. aslo, since trees make us able to breathe, more trees means its easyer to brethe.

 hope that helps ;)