What describes meiosis I

Biology

2 answers:

Paha777 [63]2 years ago

7 0

Answer:

In meiosis I, one chromosome from each homologous pair goes to each daughter cell formed. ( In meiosis II the chromosome separates into two parts. One part goes into each daughter cell.)

lakkis [162]2 years ago

3 0

Meiosis is, a process in cell division. In this process the number of chromosomes decreases to half the original number. It occurs by two divisions of the nucleus and results in the production of 4 gametes.

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How do eukaryotes ensure that the number of chromosomes will not double

Stels [109]

Answer:

eukaryotes that ensures that the number of chromosomes will not double from parent to offspring when gametes fuse during fertilisation. Homologous pairs of chromosomes separate in meiosis I, so the gametes are haploid (n), and each gamete receives only one member of each chromosome pair.

Explanation:

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False, they will adapt

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Option: B

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Two phenotypically normal parents have a child with CF. i. What are the genotypes of each parent? ii. What is the probability th

katen-ka-za [31]

To first dive into your question, here are some vocabulary terms that I will be using and will be helpful to you as well.

Homozygous dominant (BB): Is not affected by cystic fibrosis.
Homozygous recessive (bb): Is affected by cystic fibrosis.
Heterozygous (Bb): A carrier for cystic fibrosis.
Phenotype (Ex: Having cystic fibrosis): The appearance of an allele pair.
Genotype (Ex: bb): The genetic makeup of an allele pair.

We know that if both of the parents are phenotypically normal, there is no way that they can be homozygous recessive (bb), or have cystic fibrosis. We also know that since they have a child with this disease, they can't be homozygous dominant (BB) either. This means that both parents have to be carriers (Bb) in order for them to have a child with cystic fibrosis.

Below I have attached a Punnett square with both of the heterozygous parents.

Each child they have will have a 1/4 or 25% chance of having cystic fibrosis.

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