Why all of the offspring from a purebred yellow parent and a purebred green parent will be yellow?
Since Mendel’s plants were purebred, the yellow peas had two yellow alleles and so were YY and the green peas had two green alleles and were yy. Each parent can pass one copy of their gene to the next generation. So all of the offspring got a Y from the yellow plant and a y from the green one.
When the pure breed yellow and purebred green were crossed what color of offspring resulted?
Concept 4 Some genes are dominant. I crossed pure-bred green with pure-bred yellow peas. Since yellow is dominant to green, all of the offspring were yellow.
Why do all offspring have the same fur color?
What percentage of genetic information is passed on from parents to their offspring? Why do all offspring have the same fur color? They have the same genes for each allele. Why do all offspring have brown fur?
Why all the offspring in the F1 generation were yellow instead of half being yellow and half green or some other mix of the colors?
Mendel bred his peas until they either produced seeds of one color or the other. The offspring in the F1 generation were yellow instead of being half yellow of half green or any other mix of the colors because there are traits that were studied by Mendel and he broke it down to dominant and recessive.
What happens if you cross two heterozygous?
Tutorial. The expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive). When a phenotypic ratio of 2 : 1 is observed, there is probably a lethal allele.
Why are the peas we eat green even though yellow is the dominant trait?
Turns out they have yellow peas because the yellow version, Y, is dominant over the recessive green version, y. Y always wins out over y: When a pea plant makes seeds, only one of its two copies of the color gene goes into the seed. So that is why green peas are common even though they are recessive.
When both alleles are the same this is known as?
If the two alleles are the same, the individual is homozygous for that gene. If the alleles are different, the individual is heterozygous. Though the term allele was originally used to describe variation among genes, it now also refers to variation among non-coding DNA sequences.
What cross will result in all heterozygous offspring?
P cross
The P cross produces F1 offspring that are all heterozygous for both characteristics.
How do you know if its homozygous or heterozygous?
If an organism has identical genes on both chromosomes, it is said to be homozygous. If the organism has two different alleles of the gene it is said to be heterozygous.
Is it possible for a 2 green pea plant to have a yellow offspring?
These offspring are said to be heterozygous, meaning that they have two different alleles for pea color. Despite the fact that both alleles are present in the offspring, the traits did not blend together to result in yellowish-green peas.
Why are peas not yellow?
There is a gene that determines the color of the peas the plant will produce. Genes can come in different versions. The pea “color” gene comes in a yellow version (Y) and a green version (y). Just like us, pea plants have two copies of most of their genes.
Why dont puppies look like their parents?
It’s All In the Genes That is, unless both parents carry a recessive gene (from previous generations), such as a liver color. If both parents pass the recessive gene, the offspring will be liver colored, but the most likely result is a litter of black puppies.
