Answer:
50% AA and 50% Aa
Explanation:
Punnet square is a tool used to examine the offspring's genotype result of a breeding experiment. We will need to put the genotype of a parent in the row, and other parents at the column. The parent is homozygous(AA) and heterozygous(Aa), the square will be:
AA
A A
A AA AA
Aa a Aa Aa
The result will be 50% AA and 50% Aa
Well either way, it would be difficult for them to find mates, but if 50% of males were gone, the females would be able to reproduce with the men they have but if the females were killed off, it would affect birth rates even worse because the women carry the offspring. All of this also includes the offspring's gender
C - Eukaryotes and heterotrophic.
Good luck!
Answer:
Genotype ratio: 1, 1:1, 1:2:1
Phenotype ratio: 1, 3:1
Explanation:
Single gene pair cross is also known as monohybrid cross. This means that only one gene usually with two alleles is observed and it express one trait.
For example, if we name the gene for a certain trait with A, the possible genotypes are AA (dominant homozygous), aa (recessive homozygous) and Aa (heterozygous). Possible crosses are:
P: AA x AA
F1 : all of them are AA
The same is with aa x aa (all of the offspring are with aa genotype)
P: AA x Aa
F1: AA Aa AA Aa (genotype ratio 1:1) (phenotype ratio 3:1)
The same genotype ratio is in aa x Aa (offspring will have aa Aa aa Aa-(genotype ratio 1:1) (phenotype ratio 1:1)
P: Aa x Aa
F1: AA Aa Aa aa (genotype ratio 1:2:1) (phenotype ratio 3:1)
P: AA x aa
F1: Aa Aa Aa Aa (1)
Answer:
Changes in the environment may leave individuals less well adapted to compete successfully for resources such as food, water and mates. Sometimes an entire species may become unable to compete successfully and reproduce. These problems can lead to extinction.
